Adverse possession in Texas is controlled by statutes passed by the state legislature, but also by the courts. Importantly, Texas places the burden of proof to establish a claim of adverse possession on the trespasser.
The European starling may fletch only after 21 to 23 days, while a chimney swift may take 28 to 30 days to leave its nest. Some birds, such as the kildeer, leave the nest within hours of hatching and become independent after 20 to 31 days. Perhaps the slowest bird to learn to fly is the rock pigeon. If the egg is laid in midwinter, the baby can take 45 days to fletch.
Bluebirds can fledge (leave the nest) anywhere from 16 to 21 days after hatching. When the birds get close to leaving, you can see them poking their heads out from the entrance hole of the bird house. It's important to NOT open the nest box when you are within 5 days or so of fledging.