BLUEBIRD BOXES: When it comes to attracting bluebirds -- "if you build it, they will come." That's coming up on Passport to Texas. This is Passport to Texas Not all birds nest in trees. [sfx ... .bluebird song] In fact, bluebirds are actually a cavity dwelling species in need of holes to build their homes. Habitat loss has diminished their housing opportunities, but bluebird enthusiasts are rolling out the welcome mat with man- made nest boxes. 16 -- It's a rectangular box. In Texas we make it with a large overhanging roof, to protect from the sun. The dimensions are a little larger, that's because our birds need more air because it's so hot. Our birds need to be protected from the heat. Pauline Tom is with the Texas Bluebird Society. The hole of bluebird nest box is about one and a half inches ... perfect for a bluebird, not so great for a European Starling. 16 -- These birds came over from England in the mid 1800's. It was like bringing fire ants in, a terrible, terrible pest. And so they'll take the cavities that our native birds need, and they'll actually destroy the eggs and the nestling. For information on how to build you own nest box, log on to the Texas Parks and Wildlife web site. If you do take on the responsibility of a blue bird nest box ... 09 -- You would clean out the nest box when the birds fledge. The nest box is used over and over. That's our show for today. For Texas Parks and Wildlife, I'm Cecilia Nasti. Total sound bite time: 0:41.0 Maximum Script time: 0:44.0 Suggested show time: 86.0 = 1:26