1. Songbird baby predation is mostly from snakes and squirrels including chipmunks. Crows actually account for very few baby bird deaths.
2. I have a band of crows living near our large front yard, however I have not been able to find their nest yet.
3. I live in an area that only has crows, no ravens. But if I saw them side by side I could distinguish them apart.
4. Crows alert the neighborhood of predators, they eat nice and insect pest, they distribute seeds.