Naturespeak A naturalist's view of the world

April 25, 2014

Inside Out Zoo

Filed under: Uncategorized — wykes @ 10:54 am

Not a Clue! Muskrat as Beaver photo IMG_4108_zps8ed61d5d.jpg

I went to the Detroit Zoo with one thing in mind and left with another thing to take its place. The new beaver exhibit was done and I thought it might be fun to catch the critters in action and get a few detail shots etc. That was my intention, anyhow. Never mind that I’d read that the new beavers, Ward and June, were “shy” and that they were basically no-shows for the visitors. Someone else told me the same story personally, yet I persisted.  I went anyway and was not disappointed in being disappointed.

Not only were the beavers in absentia but it appeared, based on the wilting lettuce and un-chewed cottonwood branches placed out for them, that they had not been out for some time. There were plenty of fat Rainbow Trout swimming in the viewing pond but no beaver. It was a great Rainbow Trout exhibit. I will not blame the keepers for the faults of their kept – beavers are basically nocturnal critters (it was daylight, by the way) and, who knows, perhaps the Beavers were inside the lodge making little cleavers! The Red Pandas were also in hiding, so they were not the only ones being anti-social.

The lack of living beavers prompted me to look at the labels. I’m ashamed to admit it, but as a person who once made his living writing labels I rarely read them unless forced by circumstance. Beaverlessness was just such a circumstance. I shouldn’t have done so.

I watched as hordes of small children charged the underwater viewing window screaming bee-er, bee-er (meaning beaver, not refreshment) and changing their chant to bish, bish (small childeese for fish). Their helpful parents, seeking to salvage the experience, would look up and read the large label that says something to the effect that “if the beavers are not out, then look up at the monitor and see what they were doing last night.”  I did the same thing after I charged the glass and saw the invisible beavers.

Apparently Sir David Attenborough and a set of mountains were in the beaver enclosure the previous night. The video showed beavers in a mountain pond setting with background narration and music. In one segment there was a grainy black and white night camera view of the interior of a lodge with “beavers” moving around.

“Look”, cooed one mother who happened to look up just as this sequence was playing, “there they are!”  The problem was that the pictured “beavers” were actually muskrats taking up lodging in a beaver lodge. The distinctive voice of Sir David could be heard explaining that “no one is really sure if the beavers much care about these interlopers but…”  Our mother’s excitement faded off when she realized that it was only a documentary movie and she hurried her children off to the Red Panda exhibit.

The experience all fell apart upon looking at the other labels. The photo illustrations used to depict the fascinating lifestyle of Castor canadensis implied that beavers are able to morph into Nutrias and Muskrats during the course of their daily lives. Perhaps the muskrats in the Attenborough video actually were beavers in disguise – fooling even that seasoned old naturalist.  When asked to display their ever-growing front incisors, the beavers turn into Nutrias and fool everyone else into thinking they are illegal immigrants from South America.

You might recall an earlier post in which I blasted the Detroit Zoo’s magazine for using Nutria pictures to illustrate their article about the up-coming beaver exhibit last year. Simple mistake, I thought…stupid mistake given their obvious differences but zoo people and editors (at least most of them) are human and prone to mistakes.  Certainly this was a “one off” thing.  Well, it wasn’t.

Nutria as Beaver photo IMG_4109_zps86bcac81.jpg

There were two Muskrat photos (see beginning photo  and below) and one Nutria portrait (see toothy beast above center) on the beaver display panels. Remember, this is a brand new exhibit minted in 2013. There is no excuse for this. None.  This is what happens when Jr. High students are enlisted to make labels based on Wikipedia articles and not professionals. Is it really that hard to tell the difference between a Muskrat, Nutria, and a Beaver? Really? Zoo educators don’t seem to have the same issue when differentiating the African and Chilean Flamingos. Nor would they dream of putting a Black Rhino photo to illustrate the White Rhino exhibit.

 photo 3b416d18-d421-4290-b7c6-18ef1ce22856_zps45d975f9.jpg

Beavers have been known to do a pretty good imitation of Chilean Flamingos when trying to spy on Nutria colonies in South America, so I’d advise that the zoo personnel to be very careful.

Detroit Zoo Night Heron rookery photo IMG_4141_zps2686835f.jpg

So as not to seem like a curmudgeon, I must say that I was fully impressed by another display at the Detroit Zoo. There is a free-ranging colony of Black-Crowned Night Herons near the Sweet Treats concession stand. These are wild birds and not part of the caged crowd. An excess of 60 of the pint-sized herons have returned to the rookery and are ready to resume the breeding season.  One of the docents, exuding much more accuracy than the beaver labels, said that the birds returned last week. The rookery has been an annual feature at the zoo for nearly a decade.

 photo IMG_4123_zps22ef7144.jpg

Black-crowned Night Heron at Detroit Zoo photo IMG_4127_zps8a34dfa4.jpg

Black-crowned Night Heron at Detroit Zoo photo IMG_4119_zpsa003a275.jpg

While the pavement under the trees may be a dangerous place to stand, one can view the birds if you stand off to side and gawk. Most of the human visitors were not aware of this colony when first approaching the concession stand but most wised up upon seeing the white-wash zone beneath it. Several warned their adventurous children not to stand in this “danger zone” but I noticed a few kids daring each other to do exactly that.  The herons (at least I assume they were herons and not beavers) were not in an especially poopy mood on this day but I can imagine what things will be like later in the spring when young are in the nests.

Danger Zone under Black-crowned Night Heron rookery at Detroit Zoo photo IMG_4131_zps85b73fdc.jpg

During my visit they were apparently re-establishing pair bonds and claiming nest platforms. Some were shifting a few twigs about, but most were engaged in preening or snuggling side by side with their prospective mates. A cold wind prompted them to tuck beaks deep into their breast feathers – their ornamental head plumes sticking up like Dr. Seuss characters.

Like the beavers, Night Herons are mostly nocturnal and one would have to be in the park at night, along with Sir David, in order to catch them flying off to feed in the zoo ponds.  Unlike the Nutri-beavers, they are worth the entry fee.

Black-crowned Night Heron at Detroit Zoo photo IMG_4116_zps52ecb378.jpg

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