We should avoid killing or injuring any songbird, or any birds whose principal food consists of insects. This could be all the species and varieties of birds represented by the several families of bluebirds, including the western and mountain bluebirds; also bobolinks, catbirds, chickadees, cuckoos, roadrunner, flickers, flycatchers, grosbeaks, hummingbirds, kinglets, martins, meadowlarks, nighthawks, nuthatches, orioles, robins, shrikes, swallows, swifts, tanagers, titmice, thrushes, vireos, warblers, waxwings, whippoorwills, woodpeckers, wrens, and all other perching birds which feed entirely or chiefly on insects.
When we spray pesticides, particularly synthetic pyrethroids, the birds may eat any insects that were killed by the pesticide. It may not kill the birds directly, but it can certainly compromise their immune systems and cause them to not be able to reproduce. Herbicides containing 2,4-D will also kill insects and endanger birds. It is irresponsible for any government agency or commercial applicator to generically apply these pesticides and herbicides in areas where these birds live. Pesticides should only be applied in cracks, crevices and voids where pests can be found and not just broadcast sprayed around a home or business. Herbicides that contain 2,4-D should not be used at all on public property, nor should herbicides that contain glyphosate for other reasons.
Basically, what I am saying is that it is very important that all pesticide and herbicide applicators know all of the inhabitants of the areas where they want to apply insecticides and herbicides. I would urge everyone that uses an exterminator to ask them if they are aware of all the songbirds, lizards and other animals in the area where they are spraying and can they guarantee none of them will be harmed. If they are harmed, that is a violation of a law in some areas, such as New Mexico.
If you have any pest questions, you can contact me at firstname.lastname@example.org.