My cat Samantha was a great mouser in her younger days.
When she was 4 we moved to a new house in a new development with a big hayfield behind our backyard.
There were plenty of field mice for her to catch and she was always nice to leave them as gifts right in front of the door on the back deck.
Now there are more houses and more neighbor kitties to do the hunting so less mice are available.
One neighbor cat in particular has been very thorough in ridding our yard of mice, chipmunks and birds(right from the feeder and birdhouse even!)
It was a stray cat they found by the train tracks so she hunts to feed herself and usually leaves feathers as evidence that she has been in our yard.
Our cat has never been a bird hunter which is good since she shares her house with a bird now.

here is a photo of how Samantha catches her toy mice now-by sitting on them!