Parasites occasionally change the behavior or looks of their host, but a nasty tropical nematode alters both, making its ant host’s parasite-filled abdomen resemble a ripe red berry. According to UC Berkeley and Univ. of Arkansas biologists, this behavior is a strategy the nematode evolved to entice birds to eat the ant’s abdomen and
spread the parasite in their droppings.

A newly discovered parasite so dramatically transforms its host, an ant, that the ant comes to resemble a juicy red berry, ripe for picking, according to a report accepted for publication in The American Naturalist. This is the first example of fruit mimicry caused by a parasite .

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