The link provided by Greg F. gives good reason not to use Sevin 'wholesale'; that is why the information on the army site that I recommended is best if the area is large.

If one wishes to encourage birds, however, cover is needed, not only for them but for insects they eat, and the cover produces seeds that are also required for food.

Good inspection and hygene, for your animals, yourself and relations living with you, is usually best when dealing with Nature's critters.