Butler, Christopher J., University of Central Oklahoma, United States

• Bulletin of the Oklahoma Ornithological Society Vol. 44 No. 3-4 (2011) - Articles
  Hybridization between black-chinned (Archilochus alexandri) and ruby-throated (A. colubris) hummingbirds in Oklahoma
  Abstract  PDF
• Bulletin of the Oklahoma Ornithological Society Vol. 46 No. 4 (2013) - Articles
  Temperature affects the clarity of hummingbird feeder solutions
  Abstract  PDF