In nature there are many types of interactions; mutualism where both organisms benefit, competition where both organisms may be negatively affected, commensalism where one benefits and the other is not affected, competition where each organism is affected negatively, and predation/parasitism/herbivory where one species benefits and the other is negatively affected. Thanks to all the photographers…
via Top 25 Wild Bird Photographs of the Week: Interactions — National Geographic Society Newsroom
The Roost 