Charles Darwin is one of the most well-known biologists to this day.
known for his theory of evolution by natural selection.
Over the years he has researched,
explored and organized data to prove his discoveries.
One of his major studies was the
study of the Galapagos finches on the small island Daphne Major.
This study became a
major theme in his books.
In his chapter Galapagos in his book Voyage of The Beagle,
describing his journey, has a lot of insight on his discoveries of these Galapagos Finches
This island, Daphne Major, is one of the Galapagos Islands and is known
for only having two seasons, a wet season lasting from January to June and a dry season
lasting from July to December (Frasier, 2001).
The wet season is usually slightly warmer
in temperature than the dry season (Frasier, 2001).
There are thirteen different species of the Galapagos Finches (Terraquest, 1996).
The common similarity between these birds is their bill color (Terraquest, 1996).
Depending on their ability to breed their bills change colors, those who are able to breed
have black bills while those who are not ready to breed have yellow (Terraquest, 1996).
Of these thirteen species, there are four groups of finches, Ground finches, Tree finches,
Cactus finches and other finches.
All of the species differ in food preference, size, shape,
location and beak size (Terraquest, 1996).
There are many different types of finches and these different characteristics of the
finches determine their different diet habits.
Due to their different sizes and beak texture
and size, there are different niches and realized niches for each species of finch.
niche is all the resources that are available to the finch, while the realized niche is the
amount of resources actually utilized by the finches.
There are many different resources