Just after sunrise, in a cloud forest surrounded by patches of bamboo trees and coffee plants, the singing started. Then, a flash of scarlet flew past the raised cameras and binoculars: an Andean cock ...

Every year, on the Global Big Day, thousands of bird-watchers across the world compete to record as many species of birds as possible. In Sierra Nevada de Santa Marta, Colombia, bird-watching is ...

Bilateral gynandromorph green honeycreeper (Chlorophanes spiza) photographed in the wild in Colombia. (Credit: John Murillo.) An “extremely rare” half-female, half-male bird has been caught on film, a ...

The identification of part of the fossilized remains of a so-called "terror bird" species in South America has given researchers new insight into the apex predators ...

In a forest of Colombia, a multi-colored bird waited its turn to approach the bird feeder. When it finally came close, the onlooking scientists were stunned. On its left side, the green honeycreeper ...

In Colombia, a fossil-collecting rancher has found a giant, flightless killer from 13 million years ago — and a missing link to the region’s evolutionary history. César Perdomo, a rancher and fossil ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Millions of years ...

Nearly 20 years ago, while repairing a fence on his ranch in Colombia, fossil collector César Perdomo found the middle leg bone of a bird. The 12-million-year-old fossil, known as a tibiotarsus, ...

Standing around 10 feet tall, weighing around 220 pounds and with an axe-like beak capable of delivering devastating strikes, the terror bird would have proved a ...

This fragment of a terror bird’s left tibiotarsus, a lower leg bone in birds equivalent to that of a human tibia or shin bone, dates to around 12 million years ago ...