Learn what a Calliope hummingbird looks like, where to find these tiny birds in the U.S., and how to attract them.

In pursuit of the world’s smallest bird, we’ve come to the backyard of a flamingo pink house in Palpite, Cuba. Ornithologist Christopher Clark has a car full of gear to unload: cameras ...

The bee hummingbird is the world's smallest bird. It is about 2.25 inches long and weighs less than 2 grams, which is about the same as a cashew nut ...

Interestingly, there is a remarkable 155 kg difference between the smallest and largest species. Found in the southwestern United States and Mexico, the males of this striking bird species sport a ...

Weebill, with short, stubby, and pale beak, is one of world's smallest birds. It can grow up to 8-9 cm long and weighs around 6 grams ...

Research from the University of New Mexico biology department could help show how climate and land use change might affect hummingbirds that migrate through New Mexico. Authored by Shayne Halter, ...