One species of "Drosophila" in particular, "D. melanogaster", was used in research in genetics research. It is a common model organism in developmental biology. The genus has more than 1,500 species, and has varied appearance, behaviour, and breeding habitats. Other species which have been widely investigated include "D. pseudoobscura" (used by Dobzhansky in field research) and "D. subobscura", used in the UK as a laboratory "Drosophila". 