I have seen crows chase hawks off before. It seems like any time they see a hawk a flock (or "murder") of crows will gang up and chase the hawks away. There might be concern about crows preying on chicks...but not adults, right? It got me wondering if you could attract crows and keep them around...maybe even get them to nest nearby so they would always be there to chase off hawks. I don't know if you can make a nest box that would attract crows but I did come across this TED talk about training wild crows to use a peanut vending machine. The beauty of the vending machine is that no other animals (like squirrels) would be smart enough to use it (but you could certainly buy a lot of peanuts for what it would cost to rig up the vending machine). Anyway, it sure seems like it would be easier to attract crows than to chase away every passing hawk. Anyone out there inadvertently (or purposefully) attracting crows that never have a hawk problem?
Here's a link to the TED talk: http://www.ted.com/talks/joshua_klein_on_the_intelligence_of_crows.html
Here's a link to the TED talk: http://www.ted.com/talks/joshua_klein_on_the_intelligence_of_crows.html