# data[].attributes.body
The beak of the medium ground finch population decreased on Daphne Major from 76 to 78 because of natural selection.

# data[].attributes.body
There was a drought on Daphne. The average rainfall is 1976 was 130mm, the following year it dropped dramatically to 20mm.

# data[].attributes.body
Natural selection states that one gene changes and the rest continue to mutate.

# data[].attributes.body
Beak depth increased to 9.65 in 76' to 10.55 in 78'.

# data[].attributes.body
The finch population had to survive and the bigger beaked finch could eat the tribulus seed since they could break it open.

# data[].attributes.body
The beak length increased from 8.6 to 11.56 from 76' to 78'

# data[].attributes.body
When the drought occurred the tribulus seed survived so the big beaked finch could still eat while the portcula seed died off so the little beaks died.