Geospiza scandens
The Common Cactus Finch (Geospiza scandens), a quintessential emblem of adaptive evolution, is a medium-sized songbird endemic to the Galápagos Islands. Males are entirely sooty black, often with a brownish wash on the lower belly, while females display a dull brownish-gray back and heavily streaked breast and flanks over buffy underparts. Distinctive field marks include its elongated, pointed, and noticeably decurved (downcurved) bill, which darkens to black in breeding males and remains hor...
Found primarily in arid and semi-arid lowland zones, preferring areas dominated by Opuntia cactus scrub and dry deciduous forests from sea level up to around 600 meters.
Primarily feeds on flowers, nectar, pulp, and seeds of Opuntia cactus, supplemented by insects, larvae, and other plant matter.
Common Cactus Finches are diurnal, spending their days actively foraging. Males are highly territorial, defending prime feeding and nesting sites with persistent, clear whistling songs from prominent perches, often on top of a large Opuntia pad. Courtship involves the male singing vigorously and ...
Endemic to the Galápagos Islands, the Common Cactus Finch is a resident species found across many of the archipelago's major islands. Its distribution includes Santa Cruz, Baltra, Seymour, Daphne Major, Española, Floreana, Isabela, Fernandina, Pinta, Marchena, Genovesa, Santiago, Rábida, Pinzón, ...
Least Concern
- The Common Cactus Finch's bill is so specialized that it can probe deep into Opuntia cactus flowers, acting like a living straw to extract nectar and pollen. - They are one of the most iconic of 'Darwin's Finches,' providing crucial evidence for his theory of natural selection and adaptive radi...