Galapagos - Netflix

Natural history series exploring the Galapagos Islands, which lie 1,000 kilometres off the coast of South America.

Galapagos - Netflix

Type: Documentary

Languages: English

Status: Ended

Runtime: 60 minutes

Premier: 2006-09-29

Galapagos - Darwin's finches - Netflix

Darwin's finches (also known as the Galápagos finches) are a group of about fifteen species of passerine birds. They are well known for their remarkable diversity in beak form and function. They are often classified as the subfamily Geospizinae or tribe Geospizini. They belong to the tanager family and are not closely related to the true finches. The closest known relative of the Galápagos finches is South-American Tiaris obscurus. They were first collected by Charles Darwin on the Galápagos Islands during the second voyage of the Beagle. Apart from the Cocos finch, which is from Cocos Island, the others are found only on the Galápagos Islands. The term “Darwin's finches” was first applied by Percy Lowe in 1936, and popularised in 1947 by David Lack in his book Darwin's Finches. David Lack based his analysis on the large collection of museum specimens collected by the 1905–06 Galápagos expedition of the California Academy of Sciences, to whom Lack dedicated his 1947 book. The birds vary in size from 10 to 20 cm and weigh between 8 and 38 grams. The smallest are the warbler-finches and the largest is the vegetarian finch. The most important differences between species are in the size and shape of their beaks, which are highly adapted to different food sources. The birds are all dull-coloured. A long-term study carried out for more than 40 years by the Princeton University researchers Peter and Rosemary Grant has documented micro-evolutionary changes in beak size affected by El Niño/La Niña cycles in the Pacific.

Galapagos - Family - Netflix

For some decades, taxonomists have placed these birds in the family Emberizidae along with the New World sparrows and Old World buntings (Sulloway 1982). However, the Sibley–Ahlquist taxonomy puts Darwin's finches with the tanagers (Monroe and Sibley 1993), and at least one recent work follows that example (Burns and Skutch 2003). The American Ornithologists' Union, in its North American check-list, places the Cocos finch in the Emberizidae but with an asterisk indicating that the placement is probably wrong (AOU 1998–2006); in its tentative South American check-list, the Galápagos species are incertae sedis, of uncertain place (Remsen et al. 2007).

Galapagos - References - Netflix