Any time I had cats,I would get a "gift" of a bird or a mouse..Even though the poor things were either still very much alive or almost gone..My cats would meow to get my attention to come see what was 'caught' for me as a token of my being a good "mommie" to them..It varies,like Colleen mentioned,they don't always do it,but it does happen..
its a sense of them being dominant...and proud of them selves....they think they are bad lol
It's there way of boasting....see what a great hunter I am!!!
I think they want you to see/approve of their catch
Maybe that's there way of saying Yayyy (:
They don't always.