For 10 points, name these birds mainly taken advantage of for their stupidity in psychology experiments, whose homing variety can be trained to deliver messages.
The model of hierarchical stimulus processing was developed in these animals, as they were shown to specifically respond to a particular mixed stimulus of color and texture but not to a disjoint presentation of the two. Unlike the conditioned salivation studied in Pavlov's dogs, these animals are often conditioned to approach a key light, in response to which they open their mouth wider for a large light; this is a purely classical phenomenon called autoshaping. A US Navy project named for these animals hoped to counteract German Bismarck ships by training them for use in (*) guided missiles. They were also operant conditioned to play ping pong by BF Skinner. For 10 points, name these birds mainly taken advantage of for their stupidity in psychology experiments, whose homing variety can be trained to deliver messages.
The model of hierarchical stimulus processing was developed in these animals, as they were shown to specifically respond to a particular mixed stimulus of color and texture but not to a disjoint presentation of the two.
pigeons [prompt on birds]