For years, cats have had some sort of predatory behavior in them. Humans and animals can hear bird calls every day, but the way an organism responds to a bird's sound can vary. Humans are able to identify more varieties of birds than cats, but cats are still able to distinguish a local bird from a non-local bird. Cats respond more often to local birds than to non-local birds, because they hear local birds more frequently than non-local birds. We first need to look at the predatory behaviors that occur in cats when local birds are visible in their area. An experiment by Peter Blancher tested the number of birds killed by domestic cats. Blancher set up his experiment so that domestic cats would have the opportunity to hunt at least once a day. After the experiment, he concluded that domestic cats are responsible for 100 to 350 million deaths per year in Canada alone (Blancher, Peter Avian Conservation Ecology, Np 2013. Web. March 19, 2014). Experience has shown that domestic cats have predatory instincts and behaviors even though they spend most of their lives inside a house. This behavior occurs when a cat sees or even hears a bird or other prey; The cat exhibits these behaviors even though it is an indoor or outdoor cat. Stimulus response is a neurological energy pattern that is apparent when light or sound is registered by the senses within the body. These energetic patterns can help determine the body's behavioral response to a specific light or sound. Kelly McGinnis tested thirty-two cats responding to different bird calls; one local bird call and two non-local bird calls. She hypothesized that cats would be able to respond better to local birds than to non-local birds. She found that the cats responded more to the middle of the paper and to the sound of their surroundings as well. A cat's body language is the result of its mood resulting from a change in its environment, such as hearing a bird song. Cats will point their ears upward and look inventively if they hear a bird singing or any other noise that might arouse their curiosity. All of these different senses, combined with the use of a variety of body parts, help determine how a cat remembers and responds to bird calls. A cat can easily remember and identify a local bird call as opposed to a non-local bird call. Works Cited http://www.ace-eco.org/vol8/iss2/art3/ http://www.sciencebuddies.org/ science-fair-projects/project_ideas/MamBio_p017.shtml#background http://library.thinkquest .org/C0126246/curiosity/need_whiskers.htm http://www.aspca.org/pet-care/virtual-pet-behaviorist/ cat-behaviour/cat-aggression http://www.humanesociety.org/animals /cats/tips/cat_communication.html