they use it for self defense !!!!
Charles Darwin discover the finches in Galapagos in 1831. He noticed that the finches beaks were different compared to the finch's in Ecuador.
All known species of Darwin's Finches are found on the Galápagos islands. With the exception of one, the Cocos Finch, which is found on the Cocos Island. Darwin's finches are not actually true finches. Darwin knew they weren't finches, but an ornithologist called Percy Lowe, later in 1936 incorrectly called them "Darwin's Finches" in a book, a term which unfortunately stuck.
because they are birds. all birds have beaks :-)
Well.. from my experiences with finches - they like holly tree's, and rhododendrons.
Peter and Rosemary Grant chose to study the Finches in the Galapagos because they were hybrid.
Finches have strong beaks for cracking seed cases and nutshells.
A strong beak helps to break the shell of a nut .
There were many islands and finches on each. The finches did not fly from their home island to other islands. Different islands had different food for the finches. Darwin noticed that where there were plenty of honeysuckle flowers for the birds to feed on, the finches there had long beaks. On islands where the best bird-food was small seeds, the finches had beaks more like canary beaks, short and strong. Darwin also noticed that the finches were all from the same original flock and had probably mixed up when the islands were closer together and they could fly to any island to feed. So Darwin concluded that when the finches became isolated on different islands, their beaks evolved to be most suitable for eating the food available. The birds with the wrong beaks died young and had few chicks and these chicks unfortunately for them inherited their parents silly beaks. The birds with the right beaks fed well and had lots of chicks who inherited good beaks. So eventually nearly all the finches on any given island had the most suitably shaped beaks.
how finches use their beaks
Their beaks are different
Their beaks are different
their beaks
finches
His observations indicated that the size of the beaks of finches were responding to the ever changing environment. For instance, if the environment favored large nuts, finches born with powerful beaks capable of cracking them open would survive better than those with smaller beaks.
Charles Darwin discover the finches in Galapagos in 1831. He noticed that the finches beaks were different compared to the finch's in Ecuador.
With evolution the beaks transformed into long beaks for eating bugs and short beaks for eating seeds
With evolution the beaks transformed into long beaks for eating bugs and short beaks for eating seeds