Beware of having a filter on your lens. I set up a camcorder on a tripod and a short distance from a bird-feeder outside a hide, from where I watched the action. Many of the birds would approach the feeder, and fly away just before landing. I guessed that they were catching their reflections in the filter on the camcorder, so I removed it, and this made a big difference. Birds would then approach and land on the feeder, as they had been doing before I mounted my camcorder close to them. (The typically convex form of the camcorder's lens makes any reflected image much smaller and darker than one from a plain, possibly uncoated filter - as I expect mine was, being a polarising filter, aimed at enhancing the colours in their feathers.)