Science-The Finches Beak

Galapagos islands

home to variety of species that live no where else

Finches

discovered by Charles Darwin

needle-like beaks were used for…

insects

larger beaks were used for…

beetle larvae

how many different species of finches are there?

13

How did they gain evidence?

by numbering each finch

in 1977 what happened?

a drought

what finches were mostly impacted by the drought?

the medium ground finches died- 80%

in 1983 what happened

a huge rainstorm

what was the rainstorm of 1983 called?

El nino

The beaks changed in size in one generation called?

natural selection

What was the male finches attracted to?

the songs and appearance.

what happened when the cactus finch called?

only the cactus finch responded the others completely ignoring it

What made the experiment easier?

the island was walkable

How long did the Grants last?

40 years

how did the species seperate?

geographically

what did all the birds have in common?

the same common ancestor

even though the finches looked similar other than the beaks what was different?

the songs they sang

What island did the grants explore the most?

Daphne Major

how were the habitats different?

size, topography, and height