The best wildlife I see on my rides has been endangered by our Parks Dept. placing rat poison very near the hawks' nest just before eggs are due to hatch.
It's too late to stop what has already happened but I'm doing what I can to publicize the situation. The above story came about because I contacted them, and I'm writing to everyone else I can think of.
The rat situation is due in part to poor handling of garbage. This is a long page, but you only need to glance at the first few photos to see the problem.