A long time ago I read somewhere that birds can count to two. Well, two years ago I had a broody bantam that could count to seven. She was on free range in my garden, and for the night she was supposed to jump, together with her 7 chicks, into a rabbit cage, which was standing in my basement. (I'm suffering from constant lack-of-space-syndrom, so I must be creative.) She just refused to calm down before ALL of her chicks were in the cage. She just kept calling and calling and calling until ALL SEVEN were in the cage. She couldn't possibly hear any chick peeping; they were too far away. As soon as the last chick jumped in, she became quiet again. I find it rare because an average broody is easily satisfied with one or two chicks.