Nutrition
The nutrition of all of Darwin's finches is different. What they
eat is determined by the shape and size of their beaks. Their diets
vary by eating seeds, fruit, invertebrates, and drinking from
cactuses.
The sharp-beaked ground finches mostly feed on seeds and
invertebrates. Their sharp beaks also enable them to drink for the
cactuses. But what makes them unique to all of the other finches, is
that they will drink the seabirds blood in times of drought. They
will peck on the boobies until blood is drawn and will drink it to
provide the nutrition they need.
They will also crack open the Boobies eggs and eat the inside. They
will roll the egg into a rock with their feet until the egg cracks
and they are able to eat it.
Other organisms who drink blood are
spectral bats,
leeches, and
fleas.
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Reproduction
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