Marvin the cat just loves watching all those birds that visit our birdfeeder. His favorite is the junco which I believe because they hop around scratching on the ground making a lot of movement. When they come to visit - he meows at them the whole time.
His favorite observation point is in the sunroom where he hides behind the chair waiting for a bird to visit the window feeder. Once they land - he throws himself against the window to say hello. The only bird not impressed with this is the nuthatch who will continue to eat from the feeder no matter how loud and how many times Marvin bangs against the window.