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Saturday, December 28, 2024

A Disney Memory

Worth a reminder, during this chaotic time of year when we're all feeling especially worn out and overstretched and underpaid.  What we do is important.  Not only for the animals - the quality of our work is the quality of their lives - but for the visitors.  Especially for those brave, potentially foolish youngsters who think they might want to follow in our footsteps.  Spending some time to interact with a visitor, answer their questions, and go that extra mile for them might result in the most magical memories that they ever have.



Friday, December 27, 2024

Holiday Schedule

 It's around mid-November, sometimes earlier, than animal care managers are often faced with one of the most daunting chores of the year - setting the holiday schedule for the keepers.  Assuming that the facility is closed for the day (which is not a given, as some zoos are open on Thanksgiving and Christmas), someone still needs to come in and take care of the animals, to at least to the bare minimum of checks, feeds, and basic cleaning.  But who's it gonna be?

There are, to be fair, some keepers and aquarists who enjoy working the holidays.  I know because I'm one.  I find being at the zoo pretty much just me and the animals to be a real treat.  That being said, most folks want to go home.  Keepers with small children want to be there for their kids on Christmas morning.  Folks who have family out of town/state/country may want to travel to be with them.  And so it goes.

How the schedule is set varies from institution to institution.  At some places, seniority is the clear priority - the longer you work, the better your day off options are.  At others, it's first-requested, first-granted.  At some zoos, a deal is made - half of the keepers get Thanksgiving off, the other half Christmas (some folks being less attached to one holiday or the other, such as non-Christian keepers having no particular plans for Christmas).  At one zoo I worked, the arrangement was for everyone to work both holidays, with the understanding that, by all working together, we could get in and out in no time.  Everyone at that zoo was a local, and as the one person who did not have family within a ten minute drive of the zoo, I found that system to be less than satisfactory.

I've never found a system that makes everyone happy, nor do I ever expect to encounter one.  To be sure, there are sacrifices that are involved in working with animals, and an easy schedule is one of those.  It is nice, however, when facilities are able to do what they can to accommodate keepers to the best of their abilities.

Tuesday, December 24, 2024

Merry Christmas

Merry Christmas!  

That's it.  That's the post.

Christmas lights at San Antonio Zoo (Tripster.com)






American Rudolph

One of the most fascinating things about studying animals is learning about all of the seemingly improbable places that they can pop up in the wild.  We think of penguins as birds of the Antarctic (when we aren't incorrectly thinking of them as birds of the North Pole), but there are penguins on the equator, swimming alongside marine iguanas in the Galapagos Islands.  Three species of tapir live in the Neotropics, and then you have one randomly over in Southeast Asia.  Australia has a near monopoly on the marsupials, except for the various opossums in the Americas, one of which can be found as near at hand as my trashcan.  

Another animal that surprises some folks is the reindeer.  Reindeer ("caribou" in North America) are so closely associated with the Christmas legends that a lot of folks don't even think of them as real animals. When they do, perhaps they mostly think of them as domestic animals, which they are in Scandinavia.  Maybe they realize that they live in the wild as well, having seen their migratory herds tracked by nomadic wolves in a David Attenborough special.  But in any case, they are creatures of the frozen Far North.

Or are they?

Historically, there have been caribou living in the Lower 48.  Alaska, sure, but Idaho?  Washington?  That was the case until 2019 - just a few years ago - when scientists realized that the last free-roaming herd of caribou in the continental United States was teetering on the edge of extinction, with only three individuals left.  The animals were captured and relocated to a herd in British Colombia.  With that move, deemed necessary for the survival of those individuals and their genes, the species is extirpated in the Lower 48.  Will it ever return?  Who knows.  With restored habitat and protection, anything is possible.

Wouldn't that be a Christmas gift for the country?

Sunday, December 22, 2024

Species Fact Profile: Southern Tamandua (Tamandua tetradactyla)

                                                                Southern Tamandua

                                           Tamandua tetradactyla (Linnaeus, 1758)

Range:  Northern and Central South America east of the Andes Mountains, from northern Venezuela south to northern Argentina and Uruguay.  Also occurs on Trinidad and Tobago
Habitat: Forest, Rainforest, Grassland, Scrub, Mangrove.  Most common near water, especially in areas with lots of thick vines and lianas.  Occur at elevations up to 2000 meters
Diet: Termites, Ants, Bees
Social Grouping: Solitary, Territorial
Reproduction: Breeding takes place in the fall, with females capable of having multiple estrus cycles per breeding season.  Estrus cycle is 42 days.  A single offspring (twins are rare) is born after a pregnancy of 130-150 days.   Infants remain with their mother for the first year of life, spending the first few months riding on the back of their mother (sometimes left hidden in a tree while the mother forages)
Lifespan: 20 Years
      Conservation Status: IUCN Least Concern.  CITES Appendix II (Brazil only)

  • Body length is 53-80 centimeters, with an additional 40-59 centimeters of prehensile tail.  The underside of the tail is naked to provide a better grip when climbing.  Weigh about 4.5 kilograms.  The snout is long and curved, with a small opening about a centimeter wide
  • Fur is short and dense.  Coat color may be brown or blond.  Some individuals have bold, dark markings over the shoulders and the back (sometimes called the collared anteater).  Infant coat color varies from white to black. 
  • Foraging either on the ground or in trees.  Avoids ants with strong chemical defenses, such as leafcutter ants and army ants.   Nests are broken open using the large claws on the strong forearms.  Prey is extracted using the 40 centimeter long tongue.  The animal is toothless, but insects are ground up by the muscular gizzard in their stomachs.  Captives have been known to be partial to fruit and honey as well. 
  • Some Amazonian Indians have been known to use tamanduas for pest control, introducing them to their homes to control the numbers of ants and termites
  • The eyes are very small and weak, and the vision is believed to be poor.  Hearing is considered to be much more important
  • May be active by day or by night, using hollow trees or abandoned burrows for shelter
  • When stressed or threatened, they will hiss and emit a foul-smelling odor from their anal glands.  If pressed, they will stand upright and lash out with their powerful claws.  If attacked on the ground, they will back up against a rock or tree trunk, and then face the enemy.  To keep from injuring themselves with their claws, they walk on the outside of their hands
  • Four subspecies are generally recognized (the nominate, T. t. nigra, T. t. quichua, and T. t. straminea). Animals from the northern part of the range tend to be lighter in color with longer, narrower skulls; southern populations tend to have darker vests of fur.  Replaced to the northwest by the northern tamandua, Tamandua mexicana
  •     Widespread but locally uncommon.  No major threats.  Tolerant of some habitat disturbance.  Vulnerable to car collisions.  Sometimes hunted for meat, killed by domestic dogs, or sold on pet trade.  Sometimes persecuted by local people who fear that the tamanduas will kill their dogs.  Also hunted for the thick tendons in their tail, which can be used to make ropes, skin for leather

Saturday, December 21, 2024

Winter Solstice

Happy Winter Solstice!  I'd say that the good news is that days are going to start getting longer, but believe me, I feel like each day is already plenty long enough.  At this time of year, you can usually count on the news to do two things regarding our field.  The first is to do their annual "How do the animals handle the winter?" article/story.  The second is, in the northern zoos, anyway, to provide footage of the more cold-hardy animals frolicking in the snow and presumably loving it, even if the rest of us don't.

In the spirit of that December tradition, I've provided both here.

North American River Otters at Milwaukee County Zoo

Thursday, December 19, 2024

Book Review: Management of Wild Mammals in Captivity and A Zoo Man's Notebook

In 1919, William Hornaday, Director of the Bronx Zoo, had just about enough of his Curator of Birds, William Beebe.  Beebe was undoubtedly a brilliant and accomplished curator; the trouble Hornaday had was that Beebe's brilliant works and accomplishments were frequently taking him very far afield of the zoo, to such an extent that he was never there.  The Zoological Society eventually responded by elevating Beebe to a new role, allowing him to devote himself fully to his research efforts abroad.  They were lucky that Beebe had an adept lieutenant who was able to step into his shoes as Curator of Birds.  The protégé was Lee Saunders Crandall.

Although he started off as a bird man, and birds remained his true passion, it was on the mammals that Crandall made his biggest mark.  In 1964, he wrote his magnum opus, The Management of Wild Mammals in Captivity, a hefty tome that was an excellent literature review of what was know of keeping virtually every species of mammal which had been kept in zoos and aquariums up until that point.  A reader could find out what size enclosure the animal was kept in, what its behavior and temperament were like, what diets had been met with success, how long they lived, how they bred and raised their young, and so on.  It's a fascinating reference which still is consulted by many curators today.  I've seldom seen a zoo library that hasn't had a copy of it.

Not long after the publication of his encyclopedic work, Crandall published a second version, much streamlined and written for popular audiences.  This book, written in partnership with William Bridges, the NYZS's Curator of Publications, was A Zoo Man's Notebook.  It follows Crandall's old book in being arranged by taxonomy, following the mammals from primates to carnivores to ungulates and down the line.  It focuses primarily, however, on the stories and anecdotes that Crandall, either directly or through his colleagues, had accumulated in years of working with the various species.  It tried to answer for the public the basic question, "What are the animals actually like?"

The book is more anthropomorphic than Wild Mammals in Captivity, as one would expect for a book written for a popular audience.  That's part of what makes it fun.  It also deals much more with the human element of the zoo - staff and visitor.  One of my favorite stories in it describes a young hyena that the Bronx Zoo received from another zoo, one which had been hand-raised in that facility's nursery.  Upon its arrival in New York, the Bronx issued a press release about the new arrival; as was not uncommon in that age, a lot of the language used to describe hyenas was... less than flattering ("sulking," "cowardly," "scavenger," etc).  When this press release trickled back to the west coast city that had furnished Crandall with the hyena, the local population - especially the children - were outraged and demanded the return of the hyena, back to folks who would appreciate it.  Crandall was forced to do some spectacular backpedaling, saying that his comments were about hyenas in general, whereas this particular specimen was the cleanest, smartest, most loveable individual he'd ever met.

In yesterday's post, I bemoaned the fact that I felt that zoos were becoming too infantilized, disinclined to be serious or academic, and so on.  The works of Lee Crandall, I feel, show the ideal of what a zoo should be able to do, as an institution if not as a single individual.  Wild Mammals in Captivity was a well-written, scholarly work, extensively cited and meticulously researched, that drew together the sum of our knowledge and built upon it for the benefit of future generations of keepers and animals.  A Zoo Man's Notebook is an excellent book for a popular audience, that takes important information about animals and introduces it to the public in a simpler, more entertaining manner.  Theoretically, reading and enjoying the one could lead to seeking out and appreciating the other at a later date.  Instead of just appealing to the lowest common denominator, there's something for different audience levels.

My main regret about Crandall is that he passed (in 1969) before he could move on to his true calling, Management of Wild Birds in Captivity, which ideally would have had its A Zoo Man's Notebook companion as well.  What a contribution to zoo ornithology that would have been.


A Zoo Man's Notebook at Amazon.com