Hummingbirds have extraordinarily high metabolic demands and are vulnerable to feeder-associated disease, habitat loss, and pesticide impacts on their insect prey, with garden habitat playing an important welfare role.
Hummingbird welfare in gardens is largely within homeowner control. Clean feeders maintained every 2-3 days prevent mould and bacterial infections that kill birds. Native flowering plants provide natural nectar with complete nutritional profiles and attract the insects hummingbirds need for protein. Pesticide use in gardens kills these essential insect resources. Window strikes kill an estimated 100 million birds annually in the US, including hummingbirds. Applying window collision deterrents reduces strike mortality. During migration, hummingbirds face a challenging energetic balance: arriving at stopover habitats degraded by development or late flower timing due to climate change increases mortality risk on long journeys.