The violet-green swallow (Tachycineta thalassina) gets its name from the colouration on its back and rump. It can be distinguished from other swallows by the white patches on the sides of their rump and their white cheeks. The violet-green swallow performs acrobatic stunts over lakes and streams of the Western US, Mexico, and central America. The scientific name for Violet-green Swallow is Tachycineta thalassina. Tachycineta means fast moving and thalassina means of the sea referring to its sea-green coloured backs.