Drosophila montana
Drosophila montana, colloquially referred to as a fruit fly, is a species of fly belonging to the family Drosophilidae and the genus Drosophila. It belongs to the montana phylad, which diverged from the D. virilis species group in South Asia before its migration into North America. It is typically found in the western United States, but has been seen in Europe and Asia. There are two color phases of the species, having either a yellowish or a blackish brown thorax. It is the species of Drosophila best adapted to cold environments. Description D. montana were first described by Patterson and Wheeler in 1942. D. montana populations do not display homogeneous coloration. They have two forms of color, either light and dark. These possess a yellowish form or a blackish brown form, respectively. The light form has similar coloration to the species D. novamericana. The primary physical characteristic of the dark form is a blackish brown thorax. The dark form of D. montana also possesses a slightly brownish black stripe along its back, spanning the length of its acrostichal region. They also have legs with brown coloration, and the joints at the tips of their extremities are black. Notable physical similarities