I have trapped over 500 turtles from the ponds where i work over the past 2 years, mostly basking and red ear sliders. The traps have floats on 2 sides, measure about 3 feet square and 2 feet deep, the mechanism is a weight activated cantilever that drops them in when enough are on the top. It’s been very effective when left in the water where the feeders are. I didn’t want to kill them so I contacted our local KOA and they were happy to have them as the campers buy bread from the camp store to feed them. The past year the turtle numbers were way down and I discovered why, they would lay their eggs in the soft sand along the roads in any shaded areas. We have a family of foxes that have moved in and are feasting on the turtle eggs.