Mainly carnivorous , they eat various dipteran larvae , including mosquitos , ostracods , and copepods , and small quantities of algae .
Are adept at taking mosquitoes from the surface of the water .
Mainly carnivorous , they eat various dipteran larvae , including mosquitos , ostracods , and copepods , and small quantities of algae , and are adept at taking mosquitoes from the surface of the water .