I've categorised my portfolio according to Geography first and sub-categories are based on the type of photograpy within each Caribbean island. The sub-categories include:
Avifauna - Birds, birds and more birds
Culture
Dusk to Dawn - Sunsets, sunrises and moon rises
Fauna - Lizards, local wild life
Flora - Flowers, plants
Landscapes
Riverscapes
Seascapes
Sports
Geology