More than half of all crocodilians – which includes crocodiles, alligators and caimans – are facing extinction, scientists said.
They resemble those typically used by infants - such as pouting, whimpering and showing tantrums. The noises are similar to the babbles made by human babies.
The eastern bongo, also known as the mountain bongo, is a type of antelope that is listed as critically endangered.
"It's kind of an anomaly," said the city's parks and recreation director.
Zoo chiefs are showing off six adorable rockhopper penguin chicks hatched by proud parents this spring.
Phaloris shawnella has been detected in just two places so far in the land-locked South American republic of Paraguay.
Both fish - commonly referred to as South American darters - could disappear if the Brazilian government does not take immediate action, say scientists.
The insect is so rare that the most recent sighting of a similar species was made in a different country in 1969.
"His belly-sliding skills are 10/10!" the Smithsonian Zoo tweeted about its giant panda bear cub.
The young western lowland gorilla, the first to be born at Cleveland Zoo, is being cared for by the oldest female in the group, who takes it to be fed by humans.
These species stick around their parents longer than you might expect.
Intriguingly, researchers found that males of the species have "quite large" genitalia relative to their tiny size.
Australian funnel web spiders have killed 13 people and it is estimated 30 to 40 people are bitten each year.
Ironbound was first tagged last fall in the waters off West Ironbound Island, Nova Scotia.
For a study, researchers investigated several areas of crocodilian biology by analyzing 20 different species from around the world.
The species of mudskipper moves across water in a way that has never been seen before.
The 0.2-inch-long specimen was identified in amber from the Baltic Sea region in northern Europe.
The last documented individual was killed by a hunter in 1990.
"I chose this name as I am immensely impressed with the work of this young campaigner," the scientist behind the naming said.
Batesian mimicry is where a harmless species avoids predators by pretending to be a dangerous or toxic one.
The creatures are invisible to the naked eye, measuring around 100 micrometers long—about as thick as a human hair.
The dinosaur could bite with about three times the force of large crocodiles or great white sharks.
Teenagers' sometimes inexplicable choices can be understood as a rational developmental phase when seen through the lens of animal behavior.
Rabbits have evolved numerous beneficial adaptations and behaviors over time, which have helped them to survive the threat of predators.
Bonnethead shark, a relative of the hammerhead, eats seagrass for nutrition—and may be able to survive on it alone.
Lemurs, and several other primate species, are known to rub objects, substances or materials over certain body parts in a behavior known as "self-anointing."
A teenaged Thomas Emmel first collected what is now known as cyllopsis tomemmeli in 1959.
Too much testosterone might explain her new growth.