Large Ground Finch vs Small Ground Finch

Large Ground Finch

Geospiza magnirostris

Small35 gShrubland

The large ground finch weighs about 27–39 g (0.95–1.38 oz), and its length ranges slightly 15–16 cm (5.9–6.3 in). It is the largest species of Darwin's finch both in total size and size of beak. The feather and bill colors vary between males and females. The adult male is mostly black, with slightly browner wings and tail; the cloaca is white-streaked; the eyes are dark brown. It also has blackish legs. The tail is relatively short.

ID text from Wikipedia, CC BY-SA 4.0

Photo: Mike Brady · CC BY 4.0

Small Ground Finch

Geospiza fuliginosa

Tiny15 gShrubland

The small ground finch is the smallest of the ground finches, measuring 11 cm (4.3 in) in length. Its beak is short and pointed, with a slightly curved culmen. On average, its beak is smaller than that of the medium ground finch, but there is a significant overlap in size between the two, particularly on islands where only one of the two species exists. On islands where the two species compete directly, the difference between their beaks are greater. The male is black with white-tipped undertail coverts, while the female and young are brown with streaked underparts. Voice: The small ground finch's song is rapid and weak and is transcribed as "twichooo-twichooo" or "teur-weee".

ID text from Wikipedia, CC BY-SA 4.0

Photo: Andrew Katsis · CC BY 4.0

Photos and recordings are credited to their authors under the licence shown. Full profiles: Large Ground Finch and Small Ground Finch.