[1] The species of this genus are found in Europe, Australia, and North[1] and South America.

[2] Habronyx adults lay their eggs inside Lepidopteran larvae (i.e. caterpillars) by piercing them with their ovipositor.

[2] Habronyx eggs consist of an equatorial disc and a caudal stalk, making them look a bit like the cartoon oil lamp from Aladdin.

[3] It's thought that the shape is adapted to attach the egg to the inside of the caterpillar's integument.

[3] Like all ichneumons, the genitals of the male Habronyx consists of a capsule formed by two lateral gonosquamae.