The American Museum of Natural History is one of the world's preeminent scientific and cultural institutions. This is not a monitored account.

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What’s a spiny lumpsucker? No, it’s not a nickname for your ex. This fish's body shape and small fins mean that it isn’t the best swimmer, but a powerful pelvic fin helps it stick to solid surfaces, acting like a suction cup to hold it in place as it hides from predators.
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Few things make it feel more like fall than the foliage of the red maple tree. #DYK? It sports something red all year round: in winter, it has red buds; in spring, red flowers begin to bloom; in summer, the leaf stalks turn red; & in autumn, the foliage is a vivid orange-red.🍁
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#DYK? The short beaked echidna is a monotreme, meaning it’s one of the few mammals that lays eggs instead of bearing live young. And? This species is unusually long-lived, with individuals living up to 50 years in captivity. This spiky critter can weigh ~15.4 lbs (7 kg).
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This cricket isn’t named Jiminy. Growing ~1.9 in (5 cm) long, the armored bush cricket uses powerful jaws to feed on a diet that includes leaves, other crickets, & even nestling birds. When threatened, it's able to squirt a distasteful liquid called hemolymph at foes.
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What’s up? Not the ground pangolin. It spends most of its time on the ground, creating underground burrows to snooze in during daylight. At night, it uses its long tongue to slurp up insects. When threatened, it can roll up into a ball, protecting its soft body from predators.
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Who’s this fuzzy noodle? That would be the long-tailed weasel. North America’s largest weasel, this nocturnal critter feeds on small mammals, insects, and birds. It inhabits the burrows of other species, but it’s also a skilled climber that can often be found in the trees.
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Meet the gold-mouth sea squirt! This filter-feeder draws in water through an opening known as a siphon to devour phytoplankton and bacteria. It can be found in waters off of Southeast Asia and Australia.
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Why does the binturong smell like buttered popcorn The answer is... pee! A chemical compound-2-acetyl-1-pyrroline-in this critter's urine is the same one found in popcorn. It uses its signature scent to mark its territory and attract mates.
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The little pygmy possum is the smallest possum in the world. This marsupial typically weighs only 0.4 oz (10 g)—about the weight of 10 almonds. This omnivore has a taste for the nectar & pollen of flowering plants, and it can consume up to 7% of its body weight in a single day!
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#OTD in 1914, Martha (the last-known living Passenger Pigeon) died at the Cincinnati Zoo. Her death—at 29 after a lifetime in captivity—marked the disappearance of her once-abundant species from the world & made her name synonymous with species extinction at human hands.
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What color is the Australian King Parrot? 👀 If you answered red and green, you’re only partially right! Under UV light, some of its plumage has a distinctly golden hue, which is invisible to the human eye. How can you tell males and females apart? Males have red heads.
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Ever heard of the aardwolf? It’s an insectivorous mammal that’s in the same family as the hyena. Unlike its carnivorous relatives, it’s one of a few mammals that feed exclusively on termites. In summertime, it can gobble up ~200,000 termites for its midnight meal!
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Meet the giant rain frog! To survive the summer heat, this amphibian burrows underground. At about 1.8 in (4.5cm) long, it’s the largest of all rain frogs. When threatened, it can blow up like a balloon, intimidating foes with sudden roundness.
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Have you ever seen a “bleeding” fungus? When the devil’s tooth is moist, it oozes striking droplets of red liquid. But this only happens when the fungus is young—as it grows, it turns brownish & stops secreting fluid. Believe it or not, this “bleeding” mushroom is not toxic!
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This critter can spend up to 23 hours a day looking for food! Meet the Eastern mole. This dirt puppy weighs 4.9 oz (140 g)—about the weight of about two C batteries. With poor eyesight, it spends most of its life underground hunting for worms and other insects.
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This archival image, snapped sometime before 1960, depicts duck-billed dinosaurs on display at the Museum. Also known as hadrosaurs, these massive herbivores were the dominant plant-eaters during the Late Cretaceous ~85 million years ago.
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What’s that critter? It’s the lowland streaked tenrec. Its yellow & black quills provide protection from predators, but also serve as a means of communication! This animal can rattle its quill tips together, producing a high-pitched sound that’s thought to signal others.
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Have you ever seen a glass squid? Their bodies are mostly see-through, helping them hide from predators, except for their opaque eyes. However, a light-producing organ below their eyes emits flashes, mimicking sunlight from above to camouflage them from threats lurking below.
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The Warren mastodon was discovered in 1845 by a crew digging for peat fuel. Every bone in its skeleton is real—it was the first complete American mastodon skeleton found in the USA and is still one of the most complete mastodon skeletons known.
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Meet one of the world’s smallest reptiles: the Nosy Hara leaf chameleon! An adult grows to be just over 1 inch (2.5 cm) long, & a juvenile can fit on the head of a match. Scientists think that its miniature size may be an extreme form of island dwarfism.
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