Lifespan
How long do possums live?
Wild Virginia opossums usually live just 1.5 to 2 years, and 3 to 4 in human care. Here is why…
The field guide
Author: Zooologist
Articles
Speed
How fast can a tiger run?
Tigers sprint at about 49–65 km/h (30–40 mph) in short bursts. They are about as fast as lions and far…
Adaptations
Lion adaptations: how lions hunt, share and survive
Lions survive by teamwork. Prides stalk big prey together, manes signal health to rivals and mates, and desert lions get…
Comparisons
Polar bear vs grizzly bear size: which is bigger?
Polar bears are bigger than grizzlies on average: males weigh 350–590 kg against 180–270 kg. Only the biggest coastal Alaskan…
Anatomy & appearance
What Is An Okapi
The okapi was first discovered by Europeans in 1901 when British explorer Harry Johnston came across it during his expedition…
Adaptations
Adaptations of a giraffe: how the tallest animal makes its height work
A giraffe's key adaptations are its 1.8 m neck, a heart that pumps at nearly twice human blood pressure, a…
Adaptations
Tiger adaptations: how tigers hunt, hide and survive
Stripes that look green to deer, night vision about six times better than ours, 10 cm claws and strong swimming:…
Conservation & population
Why Are Axolotls Endangered & Why Are Axolotls Important?
Axolotls are a species of aquatic salamander that is native to Lake Xochimilco and surrounding canals in central Mexico. It…
Diet & feeding
What do Siberian tigers eat?
Siberian (Amur) tigers live mainly on wild boar, red deer, roe deer and sika deer, making a kill about once…
Adaptations
Adaptations of a cheetah: how it is built for speed
Cheetahs are built for short, fast chases: a bendy spine, grippy claws, a steering tail, big nostrils and an inner…
Senses
What Colors Can Deer See?
Deer see colors differently than we do, but they are able to see a wider range of colors. This is…
Conservation & population
Why are vaquitas endangered?
Vaquitas drown in gillnets, mostly illegal nets set for totoaba fish. The 2025 survey saw 7 to 10 of them,…