One mountain in Brazil is home to a surprising number of these parasitic wasps

Thought to thrive in milder climates, many species of Darwin wasps apparently love the tropics too

A pinned speciment of a Darwin wasp with a brilliant blue body.

The brilliantly blue Pimpla caerulea is one of the Darwin wasps that researchers found living on the slope of a Brazilian mountain.

Kari Kaunisto/Biodiversity Unit/University of Turku

The tropics are teeming with life, tending to hold far more species than milder environments closer to the poles.