A parasitic wasp, family Ichneumonidae, oviposits in grass seeds in Wisconsin, USA. Her target is not the grass itself, but other insect eggs and larvae hidden within. When she finds a suitable host, she will lay her eggs in or around the doomed eggs or larvae, which will hatch and devour them.
Tricolored Bumble Bee, Bombus ternarius (Wisconsin, USA).
Myrmosid ant (Myrmosidae, genus Myrmosa) from Iowa, USA.
