[Answer] Why are the large finches now living on the Galápagos Islands different from the original source population from a nearby island?

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Why are the large finches now living on the Galápagos Islands different from the original source population from a nearby island? The closest known relative of the Galápagos finches is the 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 Galápagos tortoise complex or Galápagos giant tortoise complex (Chelonoidis nigra and related species) are the largest living species of tortoise.Modern Galápagos tortoises can weigh up to 417 kg (919 lb). Today giant tortoises exist on only two remote archipelagos: the Galápagos Islands about 1 000 km (620 mi) due west of mainland Ecuador; and Aldabrachelys gigantea of Aldabra in the ... Galápagos wildlife - Wikipedia Galápagos wildlife - Wikipedia Isabela Island (Galápagos) - Wikipedia One of the best-known is the Galápagos tortoise which lives on seven of the islands .It has an average ...

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