Are passenger pigeons endangered animals

There are about 310 species of pigeons. Several are endangered. The passenger pigeon, which numbered from 3.5 to 5 billion, was hunted to extinction in about 80 years. The common Rock Pigeon (that we see in most large cities) does not even number 200 million, but is not at risk of going extinct.

The Socorro Dove is extinct in the wild (pigeons and doves are the same order and family, but different species. E.g., the common city pigeon, the Rock Pigeon is actually the Rock Dove); the Victoria Crowned Pigeon is Near Threatened (classification on the path to extinction); the Negros Fruit Dove, the Silver Pigeon and the Sulu Bleeding Heart remain with less that 50 in existence. There are a number of other pigeon species that have less than 500 individuals still alive.

The reasons for extinction are almost always related directly to mankind, in the destruction of habitats and hunting.