A mason wasp pupa (Antherhynchium flavomarginatum; left) and a mason wasp larva, parasitized by the larval parasitoid Lycogaster violaceipennis (right)FELIX FORNOFF, UNIVERSITY OF FREIBURG See P.P.A. Staniczenko et al., “Predicting the effect of habitat modification on networks of interacting species,” Nature Communications, doi:10.1038/s4
Image of the Day: Bad House Guest
Parasitoid wasps inoculate other insects with their eggs, and their offspring then grow to feed on their "homes," effectively sucking the life out of their dying hosts.

