Vampire Finch - WikiVisually
- Author: Adam Floyd Oct 19, 2017,
Oct 19, 2017, 7:02
The vampire finch (Geospiza difficilis septentrionalis) is a small bird native to the Galapagos Islands. It is a subspecies very different from that of the terrestrial finch with the sharp end of the Wolf and Darwin islands.The vampire finch is of sexual dimorphism as is typical of its genus, with mainly black males and gray females with brown stripes. It has the largest and most pointed beak of all subspecies of G. difficilis , and in general it looks like a miniature Common Cactus Finch, and not like other subspecies, which resemble a small terrestrial finch with a straight bill. He has a melodious singing in Wolf, a lively singing in Darwin, and calls whistles in both islands, only in Wolf, a prolonged hum is also pronounced in his call.
This bird is most famous for its diet unusual The vampire finch occasionally feeds on drinking the blood of other birds, especially the Nazca boobies and blue-footed boobies, pecking at its skin with its sharp beak until blood is drawn. Interestingly, the boobies do not offer much resistance against this. It has been theorized that this behavior evolved from the pecking behavior that the finch uses to clean the parasites of the boar's feathers. The finches also feed on the eggs, stealing them once deposited and making them roll (pushing with their legs and their beak as a pivot) on the rocks until they break.More news: Only love
The vampire finch is in danger of extinction, being an endemism of a small island. The species of Galapagos finches together form an example of Charles Darwin's theory of natural selection. The 14 or 15 species of finches in the Galapagos are often called "Darwin finches". They are used as an example of how the descendants of an ancestor can become several species in their adaptation to different conditions.