Hummingbirds are among the most energetically demanding birds on Earth, and their welfare is threatened by habitat loss, pesticide use that depletes their insect protein sources, and the widespread hazard of window glass collisions.
Hummingbirds live at the metabolic edge: their extraordinary energy demands mean that injury, starvation, or disease rapidly becomes life-threatening. A hummingbird that strikes a window and experiences concussion or internal injury faces starvation within hours if unable to feed. Window collision injuries - concussion, broken beaks, wing trauma - frequently leave birds unable to feed but alive, creating prolonged suffering before death. Feeders that are not cleaned properly harbor Candida and bacterial growth that cause oral lesions and intestinal disease in dependent birds. The combination of habitat loss creating feeder dependence and inadequate feeder management creates a welfare trap where well-intentioned care causes harm.