Most standards use large (1.8 kg) and medium (1.1 kg) birds as benchmarks (the empennage and certain large turbofan engines use a 3.6-kg bird). There are 20 large (≥1.8 kg) and 16 medium (1.1–1.7 kg) ...

Watch your backyard come to life as amazing owl species swoop through the night skies. Get to know the types of owls you ...

These beautiful birds are North America's most common hawks ... Hawk pairs fly in large circles and gain great height before the male plunges into a deep dive and subsequent steep climb back ...

Pelicans are large aquatic birds with long beaks and throat patches ... These species are found on several continents, ...

Often taken for granted, the brightly plumaged male summer tanager is one of the more spectacular breeding birds of North America ... Rather large and often sluggish, it usually sits still ...