About Geospiza magnirostris Gould, 1837
The large ground finch (Geospiza magnirostris Gould, 1837) weighs approximately 27–39 g (0.95–1.38 oz), and has a body length between 15–16 cm (5.9–6.3 in). It is the largest species of Darwin's finch in both overall body size and beak size. Feather and bill coloration differs between adult males and adult females. Adult males are mostly black, with slightly browner wings and tail, white streaking on the cloaca, dark brown eyes, and blackish legs. They have a relatively short tail. Adult females have browner plumage than males, and sometimes have yellow-brown or grey outer feather edges. Scaled patterns extend up their bodies, and most areas of the head and torso are streaked with brown and pale yellow tones. This species is endemic to the Galapagos Islands. It inhabits the arid zone across most of the Galapagos archipelago, but is not present on the southeastern islands of Floreana, Española, San Cristóbal, and Santa Fé.
