Anyone who has watched birds find a dish of cat or dog food on the back porch knows they watch each other. The same thing goes for a place to roost (as in under

Anyone who has watched birds find a dish of cat or dog food on the back porch knows they watch each other. The same thing goes for a place to roost (as in under the eves.) One bird might find the food or the place to roost by accident but other birds are watching.