Brazilian researchers release thousands of mosquitoes infected with a bacteria that suppresses dengue fever into the environment in Rio de Janeiro.
Two of the rarest birds of prey in England, which had been satellite tagged, vanish in unexplained circumstances.
"Restaurants" of dead meat set up for endangered vultures also attract an undesirable clientele of hyenas and jackals, according to a six-year study.
A recent wildlife programme suggested that all the ants in the world weigh as much as all the people - but is that true?
A major international study finds that killings among chimpanzees result from normal competition, not human interference.
Hedgehogs are more thinly spread in the UK than previously believed, a study using ink pads to record their paw prints reveals.
The Chinese sturgeon, thought to have existed for more than 140 million years, is now on the brink of extinction, say local media.
Construction has begun on a giant observation tower in the heart of the Amazon basin in Brazil to monitor climate change.
A giant fossil, unearthed in the Sahara desert, has given scientists an unprecedented look at Spinosaurus - the largest-known carnivorous dinosaur.
The United States puts 230 species of birds on a watch list because of their rapidly declining numbers.
Researchers believe that California blue whales have recovered in numbers and the population has returned to sustainable levels.
Scientists say the jets of water that archer fish use to shoot down prey are precisely tuned, to make maximum impact at just the right distance.
A scheme to vaccinate badgers against bovine tuberculosis in a bid to tackle the disease in cattle is launched by the government.
The RSPCA is calling for a ban on keeping primates as pets after a rise in the number of calls to its cruelty and advice line concerning animals such as monkeys and marmosets.
An extremely rare Galapagos tortoise thought to be 100 years old has been given a new home at a zoo in Ohio.
The birth of a pair of rare bongo antelopes in captivity is "fantastic news" for the "critically endangered" species, say conservationists.
Neuroscientists artificially turn a mouse's fearful memory into a positive one, and vice versa.
A pest controller takes on the "biggest job of his career" when he is called to deal with a nest of more than 5,000 wasps.
Scientists produce a simple mathematical model that explains how a single sheepdog can herd a large number of sheep.
A target number of badgers to be killed in this year's pilot cull to tackle tuberculosis in cattle is announced.