iOn the Galápagos Islands, woodpecker finches use twigs and cactus spines to reach insects in holes and crevices. A bird may shorten a twig or remove its side branches before probing, giving it a better fit where the beak can’t reach.
iiOn the Galápagos Islands, woodpecker finches use twigs and cactus spines to reach insects in holes and crevices. A bird may shorten a twig or remove its side branches before probing, giving it a better fit where the beak can’t reach.