Squirrels will kill adult birds at feeders also. When I lived around them I had squirrel baffles on the poles and all my feeders had grids. My platform feeder had a 1" grid over it also to keep out the starlings and cowbirds that bully the song birds. Keeping the feeders and birdhouses quite far from fences and trees helps also. Squirrels can jump really far. I have a friend who calls them flying rats. I also had a clear dome over one niger feeder. It's a lot of paraphernalia but I felt like I had to protect them if I was going to lure birds to the feeders. Here we have trouble with hawks that sit on the fence and wait for the quail and small birds to get distracted. There's kind of a downside to feeders and bird baths I guess. Birdhouses are easier to protect. Sounds like you have a good plan for the houses. So nice that you are looking out for the babies.

We have barn swallows that come back every year .They made a home for themselves on the roof under our porch. . It was safe because no other bird would go on our porch. Very messy though & I took away our chairs& put a cardboard box for dropping All my friends thought we where nuts The first year we had them I had put out a decorative bird house ( not meant to be used as a bird house). It did have a flat roof & to our surprise 2 barn swallows build their mud nest ON TOP of the bird house .A chimney made a good roost at night .Its the stangest place I have heard of for nests. The first year they had 2 baby's then 2 years ago 4. They would sit on the railing & sometimes dive bomb us when we sat our there but finally they did get used to us Then last year ,no birds .I do know they fly a long way in winter so thought something happened to them so I tore down the nest & threw out the bird house .This year I put a smaller bird house up & sure enough a swallow found our porch ..I think it may have been one of the baby's from the previous years . It was so funny to watch this male trying to get a mate. For over a month he screamed out to every swallow that went by & even tried to build the bottom of the nest.. FInally he had luck Now these 2 are more scared of us so we try to stay off the porch.as much as possible. Also nest was small .They layed 2 eggs but one day I found a broken one on the ground .Anyone know if this is normal??? One baby was born & he hung around for a week after parents left but yesterday the parents came back overnight to the nest & he finally flew of with them .. WE WILL MISS THEM.. HOPE WE GET THEM NEXT YEAR Don't need bug spay our swallows are great hunters

You could try hanging an artificial barn swallow cup for them to use.. Here's a link : http://www.americanartifacts.com/smma/per/nestord.htm The maker has done some research,and tested it out multiple times.7 artificial nests had eggs and 2 previously built natural nests had eggs. No new nests had been built. Plus, nest cups are preferred over the more popular nesting shelves.

Thanks Lisa, I like the thought of the little birds hanging out with their cousins from the barn nest who are their seniors by approx. a week. I imagine the single parent bird did have his wings full trying to round up his whole brood each night, and probably the first two nights were enough to ensure their safety. He or she is probably in need of a rest at this point. I hope the severe rainstorms did not endanger the swallows. If by "baby" you mean my cat, I did as always and kept her in during the hazardous fledging period, but she's in and out now. She's not having much luck hunting though; only a few rodents turning up on the porch. I think the rain this past week has halted/slowed the activities of all life forms.