Attributes / relations provided by
♦ 1i-Tree Species v. 4.0, developed by the USDA Forest Service's Northern Research Station and SUNY-ESF using the Horticopia, Inc. plant database.
♦ 2Plants For A Future licensed under a
Creative Commons Attribution 4.0 License♦ 3Forest Inventory and Analysis DB version 5.1, May 4, 2013, U.S. Forest Service
♦ 4HOSTS - a Database of the World's Lepidopteran Hostplants Gaden S. Robinson, Phillip R. Ackery, Ian J. Kitching, George W. Beccaloni AND Luis M. Hernández
♦ 5del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.).
Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ 6Ben-Dov, Y., Miller, D.R. & Gibson, G.A.P.
ScaleNet 4 November 2009
♦ 7Negron, Jose F. 1995.
Cone and Seed Insects Associated with Piñon Pine. In: Shaw, Douglas W.; Aldon, Earl F.; LoSapio, Carol, technical coordinators. Desired future conditions for piñon- juniper ecosystems: Proceedings of the symposium; 1994 August 8-12; Flagstaff, AZ. Gen. Tech. Rep. RM-258. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station: 97-106.
♦ 8Thick-billed Parrot, BirdLife International (1992) Threatened Birds of the Americas. Cambridge, UK: BirdLife International.
♦ 9Maroon-fronted Parrot, BirdLife International (1992) Threatened Birds of the Americas. Cambridge, UK: BirdLife International.