Since "leucomelas" means "white and black" in Greek, it is likely this scientific name was assigned on the basis of colorless museum specimens, preserved in alcohol. In life, these frogs…
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At times, the DWA troop of Red howler monkeys, unique in North America, are heard long before they are seen. The mechanical-sounding, rumbling growl is produced by an enormous larynx…
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Almost all mammals have seven cervical vertebrae (the bones in the neck); manatees have six, two-toed sloths have five and three-toed sloths have nine. They also have no gall-bladder nor…
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The smallest New World primate, also the smallest monkey, weighs less than five ounces (the only smaller primates are several Madagascan lemurs). Pygmy marmosets occupy a rather large range in…
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Before the 1980s, this small toucan from Northeastern South America was very rare in captivity. Since the first captive breeding took place in 1980, in a California private aviary, hundreds…
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This elegant bird is unique among toucans for having a cap of tightly curled feathers that appear "permed". While not a rare bird in its range (south of the Amazon,…
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This brightly-colored South American relative of the Canvasback, Redhead, and Scaups is another widely kept zoo duck that thrives in captivity. In contrast to the purplish-black and gray-pinstriped male, the…
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This magnificent bird was first bred in captivity, in Europe, more than 160 years ago, and his been highly prized in zoos and important private collections ever since. Found in…
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Not closely related to North American geese, this is an inhabitant of jungle rivers. Though it occupies a large range in northern South America, it is classified as Near Threatened.…
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Before the 1970s, this Northern South American monkey was very rare in captivity, but an improved understanding of its diet and health have led to this species being bred frequently,…
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