Ostriches are today's largest birds, but in the past - even these giants would have seemed relatively miniature.
The former MoD UFO investigator has suggested that alien monitoring devices could be disguised as common animals.
An obscure breed of pigeon from Budapest is certainly one of the most peculiar birds you are likely to see.
A CCTV camera captured the bizarre moment a huge flock of birds flew straight into the pavement.
You might not have heard them do it, but fish are capable of making all manner of croaks, chirps and other sounds.
The streets of Chongzuo City were filled with large flightless birds at the weekend after 80 ostriches escaped from a local farm.
Ravens seem to have developed a severe dislike of delivery drones in the skies over Canberra, Australia.
A 3,000-year-old clay figurine found in China bears more than a passing resemblance to the pigs from Angry Birds.
The lack of visitors to the iconic Scottish loch during lockdown has made it possible for nature to take over.
A huge flock of several thousand birds swarmed around disconcerted shoppers outside a store in Texas recently.
Palaeontologists have compared the feathers of a 120 million-year-old dinosaur to those of modern birds.
Authorities are investigating what might have caused an entire flock of starlings to suddenly drop dead.
Newly released documents have revealed how the CIA used birds and other animals during the Cold War.
New research has revealed just how dangerous tall, reflective buildings are to wild birds in large cities.
Scientists now believe that humans, like birds, may be able to sense the Earth's magnetic field.
A Pacific island that rose from the sea around three years ago has already been colonized by plants and birds.
Wildlife enthusiast Bret Jones had been out filming birds when he noticed something unusual in the sky.
The discovery has cemented Archaeopteryx as a transitional form between non-avian dinosaurs and birds.
According to a new study, only a few select bird species survived the asteroid strike that wiped out the dinosaurs.
Environmental officials have been left perplexed after dozens of grackles appeared to fall ill en masse.