"larger relative" is a bit ambiguous as they're all crows. Rooks are smaller than Carrion Crows but larger than Jackdaws. Maybe "largest member of the crow family" is better?
I also heard that the other reindeer never let Rudolph join in any "reindeer games". Are there any updates on this development? Has the dis-allowment of Rudolph from "reindeer games" subsided after his successful guiding of the sleigh?
With birds of prey I had a hard time getting roofvogels out of my head ( what we call bird of prey in my country) only thing I could think of was ravenous bird hahah