I hate crows. They are VERY smart and obnoxious. I am reluctant to shoot them and kill them because they are intelligent animals but I simply do what I can to drive them off. They seem to know that when I shoot my pellet gun near them that they are in mortal danger and leave.
As far as telephoto lenses go . . . .
I use mostly a Nikon D810 and not long ago bought the G2 version of the Tamron 150-600mm telephoto lens. It is not expensive as long lenses go but to me still at $1500 a bit pricey, but it is not a constant aperture which would be thousands more expensive. Anyway, to make a long story short, the lens is great, sharp as a tack even at 600mm. They make the lens for Canon and Sony and perhaps some other brand of cameras. I recommend this lens if you really want to reach out.
Water resistant and web connectivity, especially to YouTube? BTW, that is a bit pricey but since I am the Coupon Whisperer, I have my ways of knocking the price waaaay down.