The document provides information about different types of birds found around the world. It discusses the nightingale and its loud singing in urban areas to overcome noise. It also describes cuckoos as a family of birds that includes roadrunners, koels and coucals. Peacocks are described as large, colorful pheasants known for their iridescent tails over 60% of their body length. The chaffinch is one of the most common birds in Britain and Ireland with patterned plumage helping it blend in on the ground. Wood pigeons are the most numerous large wild bird in Britain with an estimated population of 2.5 million pairs. Sparrows are small passerine birds that often