[1] The genus is cosmopolitan, distributed throughout the world, with most of the described species occurring in the Palearctic realm.

Recorded hosts include the larvae of many species of lepidopterans, beetles, flies, hymenopterans, and true bugs.

[1] They are idiobionts, halting the development of the host when they lay eggs on its body.

In one report, Bracon wasps oviposited on tortrix moth larvae, which then entered privet seeds and were consumed by birds along with the fruit.

[5] Other authors still divide the genus into subgenera using morphological characters to make identification easier.