Ravens are chick predators and egg thieves as well.We have ravens around here, but agree that they (like crows) can be the warning call for avian predator mischief. My girls thankfully go into alert mode when they hear the ravens squawking. My girls also know the difference between turkey vultures, black vultures (which, for 7 years now have never been a problem) and hawks.
If my girls hear wrens fussing or squirrels chattering and "chuk-chuk-ing" they associate those sounds with predators. Having these types of 'wildlife watchdogs' around can be helpful!

How can turkey vultures or black vultures be a problem? They are scavengers not predators.
