Cat in the Yard (Dry Brush Filter)

We affectionately make reference to the neighborhood cats that wander into our yard as "kill traps". We wouldn't mind so much if they came to take out the squirrels. However, we are fairly certain that they are also interested in taking out the birds that we enjoy watching in our yard. (We once saw a neighborhood cat take out an injured rabbit; literally, it carried the rabbit away. Thankfully, we haven't see anything like that yet with the birds.)