Need to get my hens on 'Candid Camera'.

[FlyWheel]

450 feet huh? that's less than half of what I need. Perhaps a self contained camera with a long enough recording capacity, then?

 

[SunHwaKwon]

This one uses memory cards so theoretically you could keep the receiver by the coops and just swap cards and review as needed, similar to what I do with my game cameras, or just review it right there at the coops.