Watching this black vulture, normally a carrion eater, picking off ticks from a cooperative capybara which appears to understand the 'no pain, no gain' concept that its life is better off being 'tick-free' and the vulture gets a tasty meal. Mutualism is a

Watching this black vulture, normally a carrion eater, picking off ticks from a cooperative capybara which appears to understand the 'no pain, no gain' concept that its life is better off being 'tick-free' and the vulture gets a tasty meal. Mutualism is a