MITES REMEMBER ENEMIES, FIGHT BACK

Mites that Were Attacked by Rival Species as Juveniles Attack the Young of Their Former Assailants More Frequently When They Reach Adulthood.
The Scientist, Dan Cossins, October 12, 2012

Moreover, "the attacks were specifically aimed at predators of the species to which they had been exposed," the authors wrote, which suggests that mites recall and recognize the species that attacked them when they were young.

more at:
http://tinyurl.com/9v6n583
or
http://www.the-scientist.com/?articles.view/articleNo/32813/title/Mites-Remember-Enemies--Fight-Back/