Hummingbirds should be dusted with pollen, not pesticides.
NO! Sevin is an indiscriminate pesticide that’s considered moderately toxic to birds. Even if it doesn’t kill hummingbirds outright, it will kill their prey and deprive them of a vital food source. There are many safer and more targeted solutions available for controlling garden and household pests.
Mother Earth News: Organic Pest Control: What Works, What Doesn’t
About.com: Natural & Organic Pest Control Solutions for the Garden
Life, Birds, and Everything 