What a wonderful invention Shuo. You have catered for such a range of wildlife and they all look very happy to be snacking away in your drawing! Basing your invention around a tree means that it would be a familiar place for the animals, you wouldn't be disrupting their natural mode of foraging. But all of the food is entirely accessible and appropriately placed based on the animal. The transmitter for food re-stocking is also an ingenious feature! Great work Shuo, keep it up!