Chickens are the dumbest animal on earth. They're dumber than fish. They're dumber than oysters. They're even dumber than people. They only survive because they breed so much and because we breed so many of them to eat them.
You are what you eat, we say. We eat so much chicken that we've become dumb like them and an animal that does something that a chicken would never do, on account of the animal not being terminally dumb as the chicken, strikes us as really clever. Hey, look at that clever bird, it learned to eat the toads. Yeah, duh. People used to come up with tricks like that all the time, back in the day, when they had to find their food in the wild. Nowadays the greatest challenge in securing sustenance is in finding which aisle the pasta was moved to every time the supermarket hires a new manager.
Intelligence is so overrated. What does it all lead to in the end? We've dominated our environment and now our environment sucks, and btw, it's also dying, with us in it. All those smarts that helped us eat wild animals and poisonous plants, they don't look that smart now, do they?
But maybe those birds, those "bin chickens", are really smart. They've learned to live in our world, even after we've covered up everything with concrete and cars. Maybe when we're gone they'll evolve into a better intelligent species than ours, make a better civilisation than ours. One that is not so smart that it can't avoid destroying itself.