Mental Floss

PARASITES



Ian Cook

Sure, some latch on to your ankles and drink your blood, but leeches are just misunderstood parasitic worms.

Kate Horowitz






Jaroslav Vogeltanz, Wikimedia Commons // CC BY-SA 3.0

Burrows with high levels of carbon dioxide (CO2) can become death traps for the insects.

Matt Soniak










There aren’t many things more beautiful than a butterfly—or many things creepier than parasites. It’s hard to think that you’d ever find one of the former that’s also one of the latter, but nature is full of surprises.

Matt Soniak




Sarah Knutie, University of Utah

In the 1990s, the fly Philornis downsi was accidentally introduced to the Galapagos Islands, probably in a shipment of fruit. The adult flies are harmless enough as invaders go, but their kids are a real problem for the islands’ native birds, some of whic

Matt Soniak