Members of the Corvid family, which includes ravens, crows, magpies, and jays, are highly intelligent. They have complex social structures, can remember human faces, judge the fairness of a deal, and will hold grudges against people that they feel have treated them unfairly. ¹⁾

Flamingos can eat only when their head is upside down. ²⁾

Hummingbirds are the only known bird species that can fly backward, upside down, and hover in the air. This ability makes it possible for hummingbirds to sip nectar from flowers. ³⁾

These large birds, with a wingspan reaching 3.7 meters, are the most efficient travelers, can travel 10,000 miles in a single journey and circumnavigate the globe in 46 days. Albatrosses can live over 60 years and spend up to five years at sea without touching land. ⁴⁾

The ostrich is the largest living bird in the world today. It is also the fastest running bird. The emu is the second-largest bird in the world alive today. ⁵⁾

Some birds lay huge eggs. A female kiwi can lay an egg that weighs as much as 1/4 of her body weight. ⁶⁾

The largest eggs in the world are ostrich eggs. They have a volume of several dozen chicken eggs. ⁷⁾

Indian geese can fly over the Himalayas at 10,000 meters above sea level, a remarkable feat. ⁸⁾

The common starling forms the largest flocks in Europe. ⁹⁾

The eagle owl is the second-largest of the owl species. ¹⁰⁾

Ruppell’s Griffon Vultures are the highest flying birds in the world. ¹¹⁾

The black vulture is the smallest bird that comes from the condor family. In addition, it is the most numerous bird of prey living in the Western Hemisphere. ¹²⁾

The ostrich can reach speeds of up to 45 mph per hour when sprinting. ¹³⁾

Young hoatzins have a very developed first and second toe and long claws that allow them to climb branches. As adults, the claws fall off, but the birds continue to climb with their wings alone. ¹⁴⁾

Pelicans are the heaviest sea flying birds. ¹⁵⁾

The Arctic Tern has the longest migrations of all bird species, as it can cover as much as 35,000 km in a single year. ¹⁶⁾

Penguins are the most resilient to starvation. They can endure several months of starvation during breeding. ¹⁷⁾

The ostrich doesn't bury its head in the sand at all. ¹⁸⁾