Already beleaguered in numbers by habitat loss and environmental degradation, native birds need all the help they can get. It may not be a perfect solution, but it may help. Hang or post bird houses and feeders on cat-proof metal posts or wooden posts with a metal collar near the top. Houses or feeders should be at least five feet above the ground and away from objects that cats can climb on. Place feeders and bird baths away from concealing vegetation, where cats can lurk.
Many birdbaths are too low and allow easy access by cats.
Keep cats inside more often.