Cat and Birds Problem

Not sure where to put this....

Hello My cats are both in an enclosure when they go outside. It is a part of my long deck plus a 10 foot wide area all of it completely surrounded by high deer fencing. I even have the deer fencing covering at least half of the top area up to the deck. There are many wild animals here so the fence is dug in and anchored down by rocks. The cats are never allowed outside of it. The problem I am having is occasionally birds keep coming into this area and being caught. No, they aren't getting stuck in the covered area which I figured at first, they are choosing to fly low over the open area. I have a small fountain in this uncovered area which I have set up to make a LOT of noise. It doesn't have an open area of water that would attract a bird, just a noisy fountain part. We live on a lake so there is lots of water around. I also have a 4 foot tall clanging windchime there which is usually chiming and can be scary in itself, several smaller windchimes, bells plus a bunch of spinning swirling shiny hanging things in hope to keep the birds away. Lots of things happening there and it still doesn't scare all of them away. I don't feed the birds but we have trees therefore birds. I can't possibly cover the entire area with deer fencing and the cats do enjoy being outside during nice weather. I don't want to keep them inside just because of the birds. Its a controlled environment, well, except for the birds! Does anyone have any other suggestions for keeping birds away?

Try a rubber toy snake. It keeps birds out of cherry trees and dog food, so it may work lying on your deck floor,too!

My landlord has his dog in a kennel behind my house and the birds were driving that poor dog crazy swimming in his water dish and eating his food. I laid a rubber snake outside of the kennel, close to the food and water, and they now leave him alone. Kind of freaked my landlord out when he first saw it, tho.

thanks for the idea! i'll pick one up when i go shopping. does anyone else have any suggestions just in case?