GALLERIES > BIRDS > PASSERIFORMES > EMBERIZIDAE > MEDIUM GROUND-FINCH [Geospiza fortis] [plot on map]
Location: Prince Philip's Steps, Genovesa Island, Gal?pagosGPS: 0.3N, -89.9W, elev=82' MAP Date: May 21, 2008 ID : 7C2V2526 [3888 x 2592]
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Location: Cerro Brujo, San Crist?bal Island, Gal?pagosGPS: -0.8S, -89.5W, elev=2' MAP Date: May 17, 2008 ID : 7C2V0725 [3888 x 2592]
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Location: Indefatigable Island, Gal?pagosGPS: -0.7S, -90.3W, elev=67' MAP Date: May 19, 2008 ID : 7C2V1643 [3888 x 2592]
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Location: Prince Philip's Steps, Genovesa Island, Gal?pagosGPS: 0.3N, -89.9W, elev=82' MAP Date: May 21, 2008 ID : 7C2V2524 [3888 x 2592]
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Location: North Seymour Island, Gal?pagosGPS: -0.4S, -90.3W, elev=84' MAP Date: May 23, 2008 ID : 7C2V3962 [3888 x 2592]
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SPECIES INFO
The Medium Ground-finch (Geospiza fortis) is a species of bird in the Emberizidae family.
It is endemic to Ecuador. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical dry shrubland.
One of Darwin's finches, the species was the first which scientists have observed evolving in real-time due to competition from another species. Specifically, the beak of the medium ground-finch reduced in size over two decades in order to eat smaller seeds, as larger species which were introduced to their habitat were eating the larger ones, leaving the finch with an inadequate food supply.
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