This video is about the Galápagos finches.
From National Wildlife Magazine in the USA:
The Continuing Saga of the Galápagos Finches
By Sharon Levy
CHARLES DARWIN believed that natural selection was far too slow to be observed in the wild.
But for the past three decades, the same small Galápagos birds that inspired Darwin to form his revolutionary theory have been revealing that the process works with surprising speed.
Scientists can, and do, watch evolution in action—a development that would have boggled the English naturalist’s mind.
In 1835, as he traveled through the Galápagos, the 25-year-old Darwin saw a multitude of little birds.
Many months later, John Gould, an ornithologist studying Darwin’s bird skins at the Zoological Society of London, informed him that instead he had found 14 new species—every single one of them a finch, every single one found only in the Galápagos.
When he published a memoir of his voyage, Darwin wrote that in the ground finches of the Galápagos, “a nearly perfect gradation may be traced, from a beak extraordinarily thick, to one so fine, that it may be compared to that of a warbler.
New Research on Darwin’s Finches Offers Rare Glimpse Into How Species Diverge: here.
Zebra finches: here.
Stephen Jay Gould: here.