Attributes / relations provided by
♦ 1Study of Northern Virginia Ecology♦ 2Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014).
Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
♦ 3Predator-Prey Database for the family Asilidae (Hexapoda: Diptera) Prepared by Dr. Robert Lavigne, Professor Emeritus, University of Wyoming, USA and Dr. Jason Londt (Natal Museum, Pietermaritzburg)
♦ 4National Geographic Magazine - May 2016 - Yellowstone - The Carnivore Comeback