Broad Damsel Bug Taken at Musselburgh on 5th August 2018 with Panasonic Lumix LX5 in macro mode. Broad Damsel Bug. Species: Order: Family: Nabis flavomarginatus. Hemiptera. Nabidae Food: Length: Habitat: Flies/Found: Feature: They are generalist predators, catching almost any insect smaller than themselves, and cannibalizing each other when no other food is available. 7 - 9 mm. In crop fields and uncultivated areas. Larvae found May - September. Adults found June - October.