Pigeons

Pigeons come from the family Columbidae within the order Columbiformes. This include some 300 species of near passerines. Pigeons are stout-bodied birds with short necks, and have short slender bills with a fleshy chest. The species commonly referred to just as "pigeon" is the feral Rock pigeon, commonly seen in many cities.

Kingdom: Animalia

Phylum: Chordata

Subphylum: Vertebrata

Class: Aves

Order: Columbiformes

Family:Columbidae

Illiger, 1811

Classification

The are adapted to most of the habitats available on the planet and are widly distributed. Except the driest areas of the Sahara Desert, Antartica and its surrounding islands and the high Arctic. They have colonised most of the world's oceanic islands, reaching eastern Polynesia and the Chatham Islands in the Pacific, Mauritius, the Seychelles and Reunion in the Indian Ocean, and the Azores in the Atlantic Ocean.

Seeds and fruit form the major component of the diet of pigeons and doves. In fact, the family can be divided into the seed eating or granivorous species (subfamily Columbinae) and the fruit eating or frugivorous species (the other four subfamilies). The granivorous typically feed on seed found on the ground, whereas the species that feed on fruit and mast tend to feed in trees.

http://en.wikipedia.org/wiki/Columbidae

Pidgeon

1. Carotid artey2. Jugular vein3. Tracha4. Oesophagus5. Crop6. Aorta7. Left atrium 8. Left ventricles9. Liver10. Gizzard

11. Lung12. Proventriculus13. Pancreas14. Duodenum15. Small intestine16. Large intestine17. Anus18. Colon

16.17.18.