Yes that video has been around for a long time, once again though I have to stress its not very common at all, they are oppertunistic feeders, the turtles in that video obviuosly have adapted to taking off the pidgeons who for whatever reason are just standing there with them. Usually when there's pidgeons that are not flighty like that means there are often people around either feeding them or providing a means for food, which in turn usually means the turtles get in on the action. Again its a situation not relevant to the one posted about, I understand wanting to protect your birds of course but having more experiance with turtles then chickens it really seems like your actually digging to find reasons to kill this one when in fact nothing is actually being harmed. Goodness just let them enjoy something rarely seen by others instead of killing it and destroying the eggs because on a rare occasion turtles will eat birds. Turtles cannot eat or swallow something without being in the water, they will not travel on land to hunt, if the birds get to the edge of a pond its simple to block their access if there is reason to worry. Its a turtle, it has some pretty big physical limitations as far as stalking and hunting on land goes, and its not like your trying to outsmart a coon or anything. Think about it a little bit.
