Bird anatomy Birds have a four-chambered heart, in common with mammals, and some reptiles (mainly the crocodilia). This adaptation allows for an efficient nutrient and oxygen transport throughout the body, providing birds with energy to fly and maintain high levels of activity. A ruby-throated hummingbird's heart beats up to 1200 times per minute (about 20 beats per second). Many birds possess a muscular pouch along the esophagus called a crop. The crop functions to both soften food and regulate its flow through the system by storing it temporarily. The size and shape of the crop is quite variable among the birds. Members
The Battle of the Birds The silver pigeon ate them, and the golden pigeon taxed him with what the giant's daughter had done for the prince. At that the prince knew her, and married her a second time. The Battle of the Birds The Battle of the Birds is a Scottish fairy tale collected by John Francis Campbell in his "Popular Tales of the West Highlands". He recorded it from a fisherman near Inverary, John Mackenzie. Joseph Jacobs took it from there for his "Celtic Fairy Tales" and added some additional elements. Also included in "The Lilac Fairy Book" by Andrew Lang and "A Book