My whole is a reptile.
[14]
I am composed of 13 letters.
My 1, 13, 2, is the name of a female animal.
My 2, 5, 6, is a measure of length.
My 3, 4, 13, 6, is a musical instrument
My 8, 13, 7, 6, is a starting-place.
My 9, 12, 13, 5, is an image.
My 11 is a vowel.
My whole is the name of a group of islands in the Pacific Ocean.