About the Peppered Backswimmer
Notonecta maculata is a backswimmer of the family Notonectidae, found in Europe, including the United Kingdom. Notonecta maculata are small, light brown insects of the order Hemiptera. These animals have a number of dark markings on their wings and body, and have large reddish eyes. Their hind legs are modified to be oar-shaped, to allow them to swim in water.
These animals can grow up to 2 centimeters in length in their adult stage. This individual species can be distinguished from other Notonecta species by their mottled brick-coloured forewings. Notonecta maculata are voracious predators, eating many invertebrate species found in their habitats. In their juvenile stages, they primarily eat Daphnia magna and zooplankton, and in adult stages they will also include mosquito eggs to their diet, although they will also eat most things that they can find.
In their juvenile stages, they select prey based on size - when presented with multiple sizes of Daphnia, Notonecta maculata will go after larger Daphnia. The adult stages will also select for larger Daphnia and zooplankton.
The amount of light present affects the predation rate of juvenile Notonecta maculata... Wikipedia →