Tables of Contents
Tables of Contents
Sunday, December 31, 2023
New Year's Eve
Saturday, December 30, 2023
Seeing Vs. Watching
I've increasingly come of the opinion that, taxonomy be damned, there are really just two kinds of zoo animals. There are those that (might) let you see them. And there are those that actually let you watch them.
This observation came to me earlier this year, when I was visiting the newly-reopened Bird House at the Smithsonian National Zoo. The building now consists of three walk-through aviaries, one focused on shorebirds, one on waterfowl, and one on songbirds. North American songbirds are rarely exhibited - let alone highlighted - in zoos, so I was particularly interested in seeing those. I took a day off to go to the zoo, set a big chunk of that time aside for the Bird House, and went (indoor) birdwatching.
I'd really expected to be the most drawn to the songbird aviary, with its host of species that would be brand new to me. And yes, I did see a whole lot of warblers I'd never heard of before. The truth was, I almost found that exhibit to be stressful, though. Songbirds are a study in motion, constantly flitting around , from the ground to the upper branches to the depths of understory, in and out of sight. I was constantly seeing a glimpse of color out of the corner of my eye, turning around, and when I'd look, they'd be gone. A great habitat for birds, with lots of space and complexity, and fun as a scavenger hunt, but you had to be content with the briefest of glimpses, in many cases, and good luck getting photos or making positive IDs if you weren't familiar with the species, as I was not.
The ducks, on the other hand, were the showstoppers for me.
Waterfowl and raptors are the two groups of North American birds you see the most often in zoos, especially the former, which work well in walk-throughs. There was not a single duck species in that aviary which I probably hadn't seen a half dozen times already that year at other institutions. And yet... compared to the songbirds, it was so peaceful in there. Not saying that there wasn't action and drama - ducks love drama, what with their chasing and bickering and mating. It's just that, unlike the warblers and waxwings and orioles, the redheads and ruddies and canvasbacks didn't particularly mind if you watched their drama unfold.
They swam about, interacting constantly, preening and squabbling and feeding, sometimes diving and being visible in the underwater viewing windows. You could settle in for a while and see a variety of behavior and really observe them. They weren't birds that you felt like you were just checking off a list of things to see. They were fellow beings who were letting you enjoy their company. Some would even bob at the water's surface, roughly at eye-level with younger visitors, and watch you watching them, then go about their important duck business.
I saw an indigo bunting in the songbird aviary. I felt like I experienced a bufflehead.
Zoos are fun places to see a variety of animals, and sometimes, especially when I'm trying to cram too much in on a given day and am rushing about, I tend to blow through more quickly than I really should. This is especially true in the case of species that I see fairly often and might, on some level I'm embarrassed to acknowledge, might even consider a little... boring. But that time with the ducks was a good reminder - there's so much more to visiting a zoo than catching sight of an animal. There's the pleasure that comes from watching it, seeing how it moves, how it feeds, how it interacts with other animals with its habitat.
In other words, taking the first steps towards beginning to understand it.
Thursday, December 28, 2023
Happy Birthday to the ESA!
Richard Nixon, by most accounts, was not an especially nice man, and his Presidency and its scandals have impacted our politics in ways that we are still dealing with today (such as, I don't know, can you or can you not criminally prosecute a former POTUS?) So much of the conversation about Tricky Dick is tied up with Watergate and its fallout, that many people tend to overlook the truth that there were, in fact, some good things to come out of his administration.
One such jewel was the US Endangered Species Act, signed into law this day, December 28, fifty years ago in 1973. It was the sort of bipartisan commitment to protecting America's wild heritage that it's almost impossible to imagine coming out of Washington (or any State House) these days.
The law not only identified which species are endangered and took steps to reduce take (capture or killing) of them. It required the government to identify steps that could be taken to restore species that were on the decline, including the protection and restoration of habitat.
Since it's signing, a few dozen species have been removed from the list. Most of them have gotten off in what I like to call "the good way" - their numbers improved and they are no longer considered to be in imminent danger of extinction. Others... well, there's another way to no longer be an endangered species, and it's by becoming an extinct species. Species that we have lost include the little Mariana fruit bat, Bachman's warbler, and the bridled white-eye.
Like any act of government, the ESA has its detractors who view it as over-reaching or imposing on individual freedoms. On the other hand, the government (both Republican and Democratic administrations) is constantly being sued by environmental groups who say it's not doing enough to save certain species that are in need of more protection. Both sides have accused the law of being ineffective. Evidence so far does not support that claim. The NIH estimates that approximately 300 species, in contrast, have been saved from extinction by their inclusion on the list. Perhaps none is as iconic as our national symbol, the bald eagle.
Wednesday, December 27, 2023
Species Fact Profile: Prevost's Squirrel (Callosciurus prevostii)
Prevost's Squirrel
Callosciurus prevostii (Desmarest, 1822)
- Medium-sized squirrel, but largest of its genus. Body length 12-28 centimeters with an additional 7-25 centimeters of tail. Weight is approximately 325-400 grams (range 250-500 grams). Short, blunt snout. Tail is bushy but somewhat flattened.
- The top of the head, back, and tail are black or dark brown, while the underside is reddish-brown. The two sides are separated by a thin white line, with white thighs and some whit on the cheeks. Subspecies can be very variable, with some squirrels appearing almost completely black. In some the head is completely one color, in others the link of demarcation runs right through the face. Hair is short and thick, not very soft·
- Most active at dawn and dusk. At night rest inside tree hollows or in nests of twigs and leaves, wrapped up in their tail for warmth. Highly arboreal, rarely comes to the ground
- In different parts of their range they have been observed to spend more time in different parts of the tree
- Preference for coconut, rubber seeds, oil palm fruit, and figs. Possibly important seed dispersers, as they often carry food some distance away from the tree before feeding on it. They will also consume insects (extracting ants, termites, and beetles from rotten wood) and bird eggs.
- Believed to cache food in the wild (have been observed trying to wedge fruit into cracks in branches). Juveniles are not observed foraging, and may be fed by adults
- Predation has been observed by yellow-throated marten and crested serpent eagle, but likely occurs from other predators, such as wild felids and snakes, as well
- Taxonomy is murky, up to 44 subspecies have been proposed, many on the basis of differences in coloration or pattern, but the species is highly variable even within a population. Some authorities recognize as few as 6 subspecies. Possibly may be a complex of several related species
- Genus name translates to “Beautiful Squirrel” – sometimes called the ornamental or Asian tri-colored squirrel. Species name honors Florent Prevost, assistant naturalist at the Museum National d’Histoire Naturelle in Paris.
- Primary causes for potential decline are loss of habitat (though they will utilize agriculture areas, gardens, and other disturbed habitats) and collection for the pet trade. May come into contact with farmers as they increasingly feed on oil palms and other cultivated fruits
Sunday, December 24, 2023
Feliz Navidad Desde Chile!
Merry Christmas from the animals of the Buin Zoo in Chile, who are busy unwrapping their presents.
Twelve Days of Duck-Mas
Lifted from the Facebook page of the AZA Waterfowl Taxon Advisory Group:
Friday, December 22, 2023
Thursday, December 21, 2023
Fixer Upper
Working on the list of zoo updates for 2023, it strikes me that, in most cases, there are two kinds of updates in progress. There are the zoos that are planning on building big new complexes with lots of new species and new habitats - and these are in the minority. What I'm seeing a lot of is efforts to renovate, refresh, and expand existing habitats. These projects are often considered less exciting by the public, as they don't bring in new species. They are, however, the most important from animal welfare purposes.
When it first opened, Brookfield Zoo's Tropic World was one of the premier zoo exhibits in the world. In its cavernous interior, you could find not only a host of primates from around the world, but also tapirs, anteaters, even pygmy hippos wandering the "forest" floor (that forest, of course, being concrete). Sure, the animals were inside all year but hey, it's Chicago - and having a warm place where visitors could go year-round to see animals was considered of paramount importance. Today, many species have been phased out of the building - the tapirs and hippos have exhibits elsewhere in the zoo that allow them to be outside for the warmer months. Keeping apes inside year round is no longer considered best practices. And so, with that in mind, the zoo is tacking on outdoor habitats to allow the gorillas and orangutans (and other primates) to go outside.
It's a major, expensive project, the net result of which will be two exhibits for gorillas and two for orangutans, one of each of which will probably be empty at any given point, depending on the weather. On mid-days, in fall and spring, visitors may have a hard time figuring out where the animals will be - but it will be much better for the welfare of the animals, giving them more space, more choice, and more variety.
Sometimes, improving the lots of animals you have means clearing other animals out to make space. Potawatomi Zoo had a mediocre chimp exhibit and an even worse lion exhibit - neither keeping with the direction that the up-and-coming zoo wanted to go in. So, chimps were phased out. The mediocre exhibit underwent some major modifications, and is now a pretty good lion exhibit. The lion exhibit has a bear now, but only until the new habitat for that species opened which, based on the standards of exhibits Potawatomi has opened in recent years, will probably be very good.
There's a tendency among people to want and value the new - new possessions, new experiences, and, in zoos, new animals. As someone working at a zoo where it seems we never get new species, I totally get that. Before tacking on new construction projects for brand new animals, however, I think it's always best to look at the animals that you do have and ask if they're all receiving housing that meets the standards of care that you want to adhere to.
If not, they should be bumped up to the top of the list.
Tuesday, December 19, 2023
Zoo Review Updates, 2023
Here's just some of the zoo and aquarium updates from 2023, though I'm sure I've missed many!
Audubon Aquarium (having dropped "of the Americas" from its name) has reopened after a period of renovation, with the Insectarium now part of its facility. A sloth habitat has also been added.
Beardsley Zoo opened its new habitat for Andean bears. Amur tigers are the next species slated to get a new, expanded habitat.
Brookfield Zoo is working on construction on a massive new refresh of its iconic Tropic World. The expanded project will feature outdoor habitats for its gorillas and orangutans, currently only visible indoors. Small projects in progress are habitats for native birds and turtles. A further detailed masterplan is expected in the new year. The Zoo's bottlenose dolphins went on sojourn to another zoo while their habitat at Brookfield is getting spruced up.
Construction continues at Cincinnati Zoo on its new habitat for Asian elephants. The zoo's herd is already expanding with the importation of two new females from Europe.
Cleveland Metroparks Zoo completed Bear Hallow, home to sloth bears and Andean bears. The zoo has announced many upcoming projects, the most ambitious being a renovation of its iconic Rainforest. The gorillas will be moved down from the PCA building to the expanded complex, while the orangutans will soon have an outdoor exhibit in addition to the indoor.
Continuing through Ohio, Columbus Zoo has broken ground on its refresh of the North American area. While some species - notably bison - will be absent from the zoo now, the result will be larger habitats for other species. The first phase will include improved homes for wolves, eagles, black bears, otters, swans, and the zoo's impressive North American songbird aviary.
Denver Zoo opened a new American flamingo exhibit, and is currently working on an Australian exhibit.
Kansas City Zoo is now Kansas City Zoo and Aquarium, having opened the Sobela Aquarium. Sea otters, sharks, octopus, and a sea turtle help round out the impressive new complex, which only adds to the rapidly growing facility.
Milwaukee County Zoo, having had exhibit refreshes/expansions for African elephants and hippos, is moving on to their next large mammal by working on an improved home for black rhinos.
Nashville Zoo opened a new habitat for Komodo dragons, the largest such exhibit in the country. During the colder months, the outdoor portion of the exhibit will house red-crowned cranes.
North Carolina Zoo continues to plug away at building its Asian area.
Since my visit earlier this year, Oklahoma City Zoo has opened Expedition Africa, an enormous complex featuring animals large and small, from giraffes and zebras to fish and amphibians. The next project in progress is the refurbishment of the old aquarium building into new habitats for African penguins and California sea lions.
Philadelphia Insectarium is permanently closed.
Phoenix Zoo opened Predator Passage, providing new habitats for lions, spotted hyenas, meerkats, red river hog, and Ruppell's griffon vultures.
Potawatomi Zoo has converted its former chimpanzee exhibit into a new habitat for lions. The former lion exhibit is temporarily housing an Andean bear while construction continues on a brand new habitat for that species, to be built alongside a new café.
Shedd Aquarium has unveiled a new masterplan. As a first step, the iconic Caribbean Reef in the central rotunda of the building has been closed to make way for new exhibits.
Smithsonian National Zoo (finally!) opened its new Bird House. Experience Migration features three walk-through aviaries - one highlighting the shorebirds of Delaware Bay, one the waterfowl of the prairie potholes, and one the passerines of a tropical sustainable coffee farm. Outside exhibits continue to feature the big birds that previously called the complex home, including cassowary, whooping crane, and American flamingo. The large outdoor walk-through flight cage is still closed.
Toledo Zoo opened Kodiak Ridge, a new home for brown bears.
Topeka Zoo completed its new giraffe habitat.
Tulsa Zoo continues work on its new Asian elephant habitat, with new habitats for African wildlife (lions, gorillas, pygmy hippos) scheduled as next steps.
Zoo Tampa announced an exciting new masterplan that will bring lions and gorillas to the zoo, in addition to an entire South American region... and possibly sea lions.
Monday, December 18, 2023
A Parrot in a Pear Tree
Time for that annual PSA about giving any animal (and especially high maintenance ones - and they don't come much higher maintenance than parrots) as presents:
Saturday, December 16, 2023
Blended Families
From an outside perspective, the rearing of African wild dog pups by a domestic dog at the Potawatomi Zoo might seem like a strange idea. In reality, it's nothing too out of the ordinary. There is a long history of blended families in zoos in which different species come together. Most often, a domestic animal is used as a parental surrogate for an exotic newborn, such as this case.
Back in the days when most zoo animals came directly from the wild, it was common practice for dealers to focus their efforts of collecting newborns. They were easier to ship, more tractable, and more likely to adjust to life in a zoo or circus than adults of the species. The downside, of course (besides the obvious ethical implications, including how they were often collected) was their incomplete development and need for more intensive care. Mammals, in particular, were a challenge if they were not yet weaned. Prior to the development of milk formulas, the only possible solution was to provide milk from another source, and since it wasn't like you could keep a bottle of milk in the fridge in the jungle, that milk usually had to be attached to another animal. Goats, dogs, pigs, and other female, lactating animals were used to nurse baby animals. I've even heard of cases of nursing human women being pressed into service.
For birds, milk wasn't an issue. Instead, it became practice - and still is, in some facilities - for zoos to place eggs laid in their facilities by rare birds under chickens or ducks to incubate and rear. Some zoos prefer this brood rearing to the use of artificial incubators, judging live birds to be more reliable and less failable.
Today we have technology and equipment such as incubators and milk replacer, but, as in the case of Potawatomi's pups, there is still a vital role for cross-fostering. It provides socialization opportunities, for example, that the animals might lack in other rearing situations. These dogs will stand a better chance of interacting with other painted dogs in the future if, at the very least, they grow up with the understanding that they are some sort of canid, not humans.
Cross fostering is also used within members of the same species. Sometimes a mother may have too many offspring, and staff can split that large litter up with a female which may have a very small litter. It makes things more manageable for the one mom, whereas in the case of the second, she might not be willing to go through the biologically-expensive effort of raising a very small litter, so having a few more mouths to feed can be beneficial. In the case of birds, you can move eggs from inexperienced or incompetent parents and put them under more seasoned ones to increase the chick's likelihood of success. Then the chicks will grow up healthy without imprinting on humans, or on the wrong species of bird.
Reptiles, amphibians, fish, and invertebrates, of course, are considerate and come into the world fully competent, removing the need for any of these hassles.
Friday, December 15, 2023
From the News: African painted dog pups raised by golden retriever at Potawatomi Zoo
Retriever raising pack of African painted dog pups after parents ignored them
Staff at Indiana's Potawatomi Zoo were overjoyed when they welcomed the birth of a litter of eight African painted dog pups earlier this year. That joy turned to concern when it became clear very quickly that the mother wasn't inclined to show parental care. With the tight-knit social structure of the species and the amount of parental care required, that spelled trouble for the endangered little carnivores.
Thankfully, the zoo was able to use existing partnerships to source a foster mother in the form a golden retriever named Kassy, who is raising the youngsters along her own pups. Unfortunately, not all of the wild dog pups have survived (infant mortality being notoriously high in this species), but the surviving dogs are thriving in their blended family, as well as obtaining important canine socialization that will help them better integrate with members of their own species when they grow up.
Wednesday, December 13, 2023
Lanterns in the Dark
This late in the year, I've still had a few last minute animal transports to make before the weather turns too cold. As a result of airlines restrictions (and my general reluctance to ship things when a million packages are already in circulation for the holidays), I've been driving a lot, which has taken me to several zoos in the last few weeks. Whereas a few months ago I was remarking on how every zoo was decked out for Halloween, now a different décor is in place.
For many years, zoos were big on Zoo Lights - bright strands of lights wrapped around every tree, sometimes forming animals or other shapes, sometimes seemingly animated. And while some zoos are still doing that, it looks like in many cases they've been replaced by the new winter fad - Chinese lanterns.
Well, I guess they aren't really Chinese lanterns in the traditional sense. Instead they are giant light up sculptures, filled with colored lights. I've never been to an evening event to see them, but have seen them being set up at a dozen zoos by now. Every major conference I go to, I feel like there's a vendor from a lantern company peddling their services. Unlike the traditional lights, they can make a fairly decent show during the day as well as night, serving essentially as giant sculptures. Also unlike the traditional lights, they're also a bit more visually obtrusive by day. The lights you can ignore when they aren't turned on. A giant panda the size of a small truck? Less so.
I'm something of a scrooge under usual circumstances, and I've never been that into holiday light shows. They just... never did anything for me, never triggered any feelings of beauty or awe. To me, that's what live, real animals and plants are for. Still, I can't deny that they are very popular with the public and can help drive the gate at a cold, dark, quiet time of year. So, I suppose, shine on, you freaky, creepy little (big) monsters. I'm glad that you brighten up the winters for a lot of folks, even if you aren't for me.
Tuesday, December 12, 2023
Book Review: Fuzz - When Nature Breaks the Law
Sunday, December 10, 2023
Showdown at Natural Bridge
Saturday, December 9, 2023
Big and Little
Wednesday, December 6, 2023
The Elephant Lorax
"If at first you don't succeed, try, try again. Then quit. There's no point in being a damn fool about it."
- W.C. Fields
I wish that the Non-Human Rights Project would heed the advise. After years of unsuccessfully (but irritatingly) harassing the Bronx Zoo to "release" the Asian elephant Happy after declaring her to be a person, the group recently switched their efforts over to the Cheyenne Mountain Zoo, trying to wrest away that facility's African elephants. On Sunday, the NHRP was handed yet another defeat, with the judge siding with the zoo. Worth noting, from his opinion:
"There is a legitimate question in this case as to who properly speaks for the elephants (or, in other words, who gets to be the 'elephant Lorax') - the NHRP... or the Zoo, which has fed them, nurtured them, and taken care of them for many years. It appears to be the Zoo, and not the NHRP, that has the more significant relationship with Missy, Kimba, Lucky, LouLou, and Jambo."
We'd all be fools to think this is over. Either at Cheyenne Mountain or at another zoo, it's likely that this organization will again try to argue that keeping elephants in zoos is illegal and unethical. Every victory, however, helps build precedent, the foundation of the law, and helps strengthen the case of zoos to serve as the guardians for these giant animals.
A Message from Bob Chastain, Cheyenne Mountain Zoo President & CEO
Monday, December 4, 2023
Species Fact Profile: Black-and-Rufous Sengi (Rhynchocyon petersi)
Black-and-Rufous Sengi (Elephant Shrew)
Rhynchocyon petersi (Bocage, 1880)
- Adults 30 centimeters long with an additional 25 centimeters of tail. Hindlimbs are much longer than forelimbs. Defining physical trait is a long proboscis (resembling the trunk of an elephant), which is used to probe for food
- Front half of the body is covered with reddish-golden fur, the back half with black fur
- Territorial, use scent glands on the feet to mark their territories (fairly large for their size). Each animals maintains up to 10 nests across the territory at a given time
- Forage by flicking through leaf litter using their snout to uncover invertebrates, lapping up small animals with their tongues. Ants and termites make up a large portion of the diet, but they will eat animal prey small enough to get into their mouths, as well as some plant matter
- Birds such as red-capped robin chats have been observed to follow the sengis as they forage, catching insects stirred up by their hunting
- Predators include snakes and birds of prey. When pursued, take refuge in burrows or hollow logs. Also hunted by local peoples for food
- The genus name Rhynchocyon translates to "snouted dog"
- This species and its close relatives have historically been referred to as the elephant shrews; now more often being called by the name sengi, the Bantu name for these animals, as they are not especially closely related to actual shrews (and are actually closer to elephants than shrews)
- Range is fragmented due to habitat loss for timbering and agricultural expansion (though the species has some tolerance for living in farmland). Hunting does not appear to be a significant threat
Sunday, December 3, 2023
The Lion (Cubs) in Winter
It's always a treat to see newborn animals experiencing things for the first time. Consider these lion cubs from the Buffalo Zoo, enjoying a romp in their first snowfall. Today, both leopards and tigers are found in Russia's Far East, where snow is plentiful. Lions are found only in sub-Saharan Africa (and a tiny pocket of India) these days, but their historic range extended into Europe. It's strange to think that, had we not had such a hostile history with their species, we might today we watching footage of wild lions in the snow as well.
Friday, December 1, 2023
Paging Through Memories
Thursday, November 30, 2023
From the News: Rare Sumatran rhino born in Indonesia
Rare Sumatran rhino born in Indonesia
One of the most exciting moments I've had as a zoo visitor (not in my directly professional capacity) came on a rainy day in October 2014, when I had the chance to meet Harapan, the last Sumatran rhinoceros outside of Indonesia, at the Cincinnati Zoo. This meeting was especially exciting for me because, it turned out, Harapan was due to return to Indonesia soon to join the last remaining members of his species (including his siblings, also born at Cincinnati) in a captive-breeding program that would, hopefully, help save the rapidly-declining species from extinction.
And that move has just born fruit. Orange, hairy, 25 kilograms worth of fruit.
One birth does not reverse a trend, and the world's rarest rhino is still in dire straits. It's a first for this particular male, who's brother has already sired a calf in Indonesia. Still, when an animal is this close to the edge of extinction, it feels like every single birth is an act of defiance, fighting back and refusing to accept the loss as inevitable.
Tuesday, November 28, 2023
Planning Around Animals
I was on my way to a meeting today.
There's nothing that unusual about that - I feel like I spend more of my time in meetings than I do anything tangentially animal related. I think that I actually calculated that, based on the amount of time I spend in them, I will probably die in the middle of a staff meeting someday.
It wasn't going to be this meeting, however. I was about halfway across the zoo to the meeting place when I got a text saying that it needed to be postponed. There were some issues with an animal introduction under progress, and my fellow meeting attendees needed to focus on that.
They say, "Man plans, God laughs." Perhaps. But the animals laugh louder, I think. I've come to realize over the years how mind-bogglingly difficult it can be to schedule things around animals. I find this to be especially stressful, because I really like to have things planned out and scheduled. My (human) coworkers are pretty unreliable on this front, even when the animals are removed from the equation.
Still, it can be almost impossible to plan things around the animals themselves. This includes things that are rather difficult to reschedule, such as transports and medical procedures. Against such uncertainty, what chance does a run of the mill staff meeting have? I've had meetings that have had to have been rescheduled four or five times before they actually happen.
There's a lot of wonderful things about life in the zoo. Reliability is, alas, seldom one of those. Punctuality and predictability aren't either.
Monday, November 27, 2023
On the Trail of the Snail
I first learned about the Partula snails (there are many species, but only one, the Polynesian tree snail, is kept in the US, so it's usually just referred to as the Partula snail) long before I saw one. I was browsing my campus bookstore back in college (those being the days when college bookstores sold books), when I came across a book on zoos, one that would soon become one of my favorites ever. Dr. Jeff Bonner’s Sailingwith Noah was full of fascinating anecdotes from the world of zoos, some of which were old news to me, some were brand new. This was a brand new one/
Dr.
Bonner devoted a chapter of his book to the story of the snails, which I
thought was one of the most interesting and compelling conservation stories I’d
heard. So interested was I in the snails
that, more than once over the course of my career, I looked into getting the snails to exhibit at zoos that I worked at. I
would have loved to also have obtained some of the African giant land snails as
well for education animals, but that was a no-go with the permitting
authorities, so I’ve never seen one of those giants. Ultimately, I found enthusiasm for working with snails to be somewhat... limited among many of my colleagues and institutional leadership, so none of these projects ever went anywhere.
Despite my interest in the snails, however, it took me a long time to actually see one. Only a half-dozen US zoos have them and, pretty though they may be, they aren’t the easiest animals to create a visually appealing exhibit for. Usually, they are housed on paper towels in little plastic totes. Easily overlooked in a zoo setting, just as they were in the wild.
I finally got my chance just l recently when I visited the Woodland Park Zoo in Seattle. There wasn’t as much time to explore the zoo as I would have liked, and I was very eager to see the snails. I spent too much time going in circles around the small insect house, convinced that’s where I would find them, before I realized that they were actually in a separate building just down the path. There, in the Tree Snail Laboratory display, I saw my first Partula snails.
Some were sticking to the front of the glass viewing window, which Dr. Bonner assures his readers is the sign of a happy snail. I was happy to be able to get a picture and appreciate them – they were beautiful, though even tinier than I expected, about the size of a pea. Woodland Park is a gorgeous zoo of incredible exhibits, that I'll write about in turn, but of all of the animals and exhibits there, few made me as happy as those little snails stuck to the front of their window.
Saturday, November 25, 2023
Species Fact Profile: Polynesian Tree Snail (Partula nodosa)
Polynesian Tree Snail
Partula nodosa (Pfeiffer, 1851)
- Partulid snails range from 1-2.5 centimeters in length. Shells are spirals of grey, brown, white
- Primarily feeds at night. Daytime hours spent sticking to underside of leaves in shade to prevent drying out
- Has also been listed as a subspecies of Partula affinis (Partula affinis nodosa), but generally recognized as a separate species
- Historically there was some use of the shells in necklace making, but little significant trade
- Primary cause of decline is predation from the introduced carnivorous snail Euglandina rosea (rosy wolf snail) in 1977, which was in turn introduced to the islands to control the also-invasive giant African land snail (Lissacatina fulica), which was introduced as a human food source in 1967 but quickly became an agricultural pest. Between the 1970s and 1990s, approximately two-thirds of the Partula snails were driven to extinction. Today 56 of the 72 species are extinct, with an additional 10 only surviving in captivity. 26 surviving snails were collected from wild, sent to Detroit Zoo for nexus of captive breeding program
- Reintroduction efforts began in 2016 and were in place prior to the COVID pandemic, then placed on hold – hope to restart in the near future. Reintroduction consists of erecting predator-proof barriers, removing invasive snails, and gradually expanding the safe zone
- The genus Partula has been used to study adaptive radiation in islands, similar to Darwin’s finches in the Galapagos Islands.
Thursday, November 23, 2023
Happy Thanksgiving!
Happy Thanksgiving! As with every year, a big "Thank you" to the keeper and other professionals who were out at work today, some of them far from home and family. Under the best of circumstances, your coworkers become your second family, and I've had many enjoyable holiday meals far from home with my colleagues... but it can often be tough to be so far removed from what, for many people, is a day defined by family. Your hard work and sacrifice is appreciated by everyone (even the animals, even if they don't always show it!)
Wednesday, November 22, 2023
You Can't Spell Gratitude without Rat
It's a repost, but it's one of my favorite Thanksgiving videos so why not? Enjoy these pouched rats sitting down to their miniature Thanksgiving feast at the Point Defiance Zoo & Aquarium!