There are not many birds of prey that can take animals larger than their own weight, hence the cat turning the tables as described in this thread. However, the golden eagle is a remarkable example of a species that bucks this trend because it will deliberately scare red deer on a steep slope in order that the deer may injure itself and can be later scavenged. European sparrowhawks also get close to equivalent weight because the females sometimes take woodpigeons and the kill is mostly, eaten in situ and only removed after subsequent sittings (often with the help of a male in the breeding season) when the weight has been reduced enough to be carried. Therefore, a red-tailed hawk could take prey to the size of a full-grown rabbit or a cat but the success would heavily be determined by the resolve of the intended prey.
have nt peregrine sbeen known to take geese, ravens, greater black backed gulls, and even grey herons?
sparrowhawks have also been knownto take magpies wich maybe larger?
I find it interesting that golden eagles were used to hunt wolf in Siberia to. Maybe they still do , I am not sure as I have not checked on it.
One can only imagine that sight without actually going to watch it in action.
Gingling
I've seen many raptors in low condition fly - generally they seem lethargic and get exhausted quickly.
Jonathan
I have seen Red-tail actually hit and bind to Great-Horned Owl (Bubo) near the Red-tail nest. Not prey, but a big "foot-full".
I have also seen Red-tail take Black-tailed Jack rabbit.
Many raptors are capable of taking prey larger than themselves - peregrines take mallard drakes and falconers birds take cock pheasant with comparative ease (probably not many killed by wild peregrines though), biggest bird I've personally known killed by a peregrine was an adult blackcock. Female gosses can take brown hares, males can take rabbits. Spars take woodies, and I think I've read on BF of spars taking red grouse and pheasant - I've seen one take a blackwit, though it had to let go as it was over water.
In my experience it's maybe individual birds that have learnt - probably through luck - as eyasses how to tackle larger prey. Eyasses can be daft at times (and possibly very hungry) and try for prey which adults might baulk at. For instance, a juv goss might try to catch a brown hare, bind to it's back end and get kicked off - never to try again. Another might bind to the head and back and manage to subdue the hare. Next time it does the same thing and succeeds again. In daft falconry talk, the gos is now 'wedded' to that prey.
Some falconers birds take it to extremes! I knew a male peregrine that would fly through far easier prey to kill hooded crows! Last year I saw a video of a jerkin (male gyr) that would do the same to tackle Canada geese! It eventually got killed by a golden eagle I think?
Jonathan
i've heard someone talking about an osprey taking a huge fish, he couldnt lift it, but he also couldn't get his nails out of it, so he drowned while holding it.