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⁾.

Those large birds, with wing span reaching 3.7 meters, are the most efficient travelers, could travel 10,000 miles in single journey and circumnavigate the globe in 46 days. Albatrosses could live over 60 years and spend up to 5 years at sea, without touching the land⁴⁾.