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
Organisation for the Preservation of Birds and their Habitat Organisation for the Preservation of Birds and their Habitat Burung Indonesia (Indonesian for: "BirdLife Indonesia Association"), official name: Perhimpunan Pelestarian Burung Liar Indonesia or "BirdLife Indonesia Association", is the affiliate of Birdlife International in Indonesia. It was founded on July 15, 2002 with the headquarter in Bogor, Java. In 2014 the organisation had about 80 employees and six field offices. Indonesia has an enormous biodiversity because the Wallace Line and Lydekker Line splits the archipelago into three biogeographic regions . Because of this, there are both bird species of Asian origin as well as of Australian origin that live here.