k View of a Galapagos finch perched in a tree Galapagos finch. View of a Galapagos finch family Fringillidae perched in a tree. These finches inhabit the Galapagos Islands, a volcanic archi pelago some 1000 kilometres west of South America which belongs to Ecuador. The study of these birds by the naturalist Charles Darwin 18091882 led to his theory of evolution through natural selection. Darwin recognised that variations in the shape of the birds bills was due to environ mental pressures. For instance, finches with relatively strong bills could open hard seeds in times when other food sources were scarce. Only birds with such a bill could survive and breed, passing their characteristics to their offspring. Stock Photo - Afloimages
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View of a Galapagos finch perched in a tree Galapagos finch. View of a Galapagos finch family Fringillidae perched in a tree. These finches inhabit the Galapagos Islands, a volcanic archi pelago some 1000 kilometres west of South America which belongs to Ecuador. The study of these birds by the naturalist Charles Darwin 1809 1882 led to his theory of evolution through natural selection. Darwin recognised that variations in the shape of the birds bills was due to environ mental pressures. For instance, finches with relatively strong bills could open hard seeds in times when other food sources were scarce. Only birds with such a bill could survive and breed, passing their characteristics to their offspring.
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View of a Galapagos finch perched in a tree

Galapagos finch. View of a Galapagos finch (family Fringillidae) perched in a tree. These finches inhabit the Galapagos Islands, a volcanic archi- pelago some 1000 kilometres west of South America which belongs to Ecuador. The study of these birds by the naturalist Charles Darwin (1809-1882) led to his theory of evolution through natural selection. Darwin recognised that variations in the shape of the birds' bills was due to environ- mental pressures. For instance, finches with relatively strong bills could open hard seeds in times when other food sources were scarce. Only birds with such a bill could survive and breed, passing their characteristics to their offspring.

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