Yes. If you're concerned about bird populations, the greatest impact you can have is ensuring that cats are spayed/neutered, and support shelters that educate people who adopt cats to keep them indoors (as an added benefit, an indoor cat has about 3x the average lifespan of an outdoor cat). It's estimated that feral and outdoor cats kill about 3-4 billion (yes, that's with a "b") birds every year.
Really??? Head explode.