Lions are now critically endangered in West Africa. Although they once ranged continuously from Senegal to Nigeria, new research has revealed only around 250 adult lions survive in the region, and only one of the four isolated populations contains more than 50 individuals.

Say hello to the umbrellabird! The Umbrellabird is a large, tropical species of bird that is found inhabiting the rainforests of Central and South America. There are three different species of Umbrellabird which are the Long-Wattled Umbrellabird, the Amazonian Umbrellabird and the Bare-Necked Umbrellabird all of which live in slightly different areas. All three species are relatively similar in appearance with an umbrella-like crest on the top of their heads (for which they were named) and a pendant-shaped inflatable pouch on their throats. They are the largest species of perching bird (Passerine) in South America, but populations are currently falling mainly due to habitat loss. ...

An unlikely happy ending for the chemical weapon containers that were dumped in the Pacific Ocean after World War II - US scientists have discovered an array of sponges, crabs and anemones that have made them home. The barrels are still filled with unknown substances that threaten other species in the area, but these opportunistic creatures at least are thriving despite all odds.

This is Ippo, a three-month-old Italian zonkey. She is the result of a union between a male zebra and a female Amiata donkey, which is an endangered breed of donkey native to southern Tuscany. Genetic differences between the zebra and the donkey - donkeys have 62 chromosomes and zebras have between 32 and 46 - mean that hybrids like this are most often the result of a male zebra pairing with a female donkey. So far there have only been three recorded cases of a male donkey siring a zebra hybrid. ...

A pink Amazon river dolphin on the warm side of the "Meeting of the Waters." This is where the sandy Amazon River meets the dark waters of the Rio Negro in Manaus, Brazil. A strong density gradient contributes to their visible separation, as well as a significant temperature difference - the Amazon flows at around 22°C, while the Rio Negro is around 28°C.

The Monticello Dam holds back Lake Berryessa in Napa County, California, USA. The morning glory spillway associated with the dam is the largest in the world; it is a funnel-shaped outlet that allows water to bypass the Monticello Dam when it reaches capacity (1370 m³/s).

The Glory Hole is located about 61m from the dam; the distance from the funnel to the exit point - which is situated in the south side of the canyon - is about 213m. The outside diameter is 22m, slowly narrowing to 8.5m at the exit.

Water spills over the lip of the Glory Hole when the lake reaches 1,976,037,908 cubic metres (1,602,000 acre-feet). The spillway is designed to handle a maximum of 1,370,319 litres of water per second (362,000 gallons of water per second); this ha ...

The aye-aye lives in the forests of Madagascar. Despite looking like a very scared rodent, the aye-aye is a kind of lemur with a bushy tail and super-thin, elongated middle fingers that they use to dig grubs out of hollow branches. Aye-ayes also have huge lower incisors to chew through wood and bamboo—and in captivity they’ve been known to chew through concrete cinder blocks ...