Hygieostatic Bat Roost, Historical bat shelter in Comfort, Texas.

The Hygieostatic Bat Roost is a shingled, pyramid-shaped tower standing 30 feet (9.1 m) high, about 1.5 miles east of Comfort on the south side of RM 473 in Kendall County, Texas. One dormer serves as the bats' entrance while the others are ornamental, and the lower portion of the tower allows human access. Its concrete base is raised 7 feet (2.1 m) off the ground so wagons could be driven beneath to collect guano.

Albert Steves, a former San Antonio mayor pro tem, commissioned the tower in 1918 on his Kendall County land and had San Antonio health officer Dr. Charles A. R. Campbell design it. Campbell had patented a bat roost design and built several around San Antonio from 1907, aiming to curb mosquito-carried malaria by housing the bats that hunt at night. The roost was recorded as a Texas Historic Landmark in 1981 and listed on the National Register of Historic Places in 1983.

Albert Steves coined the name from the Greek words hygiea (health) and stasis (standing), a reference to the malaria-control purpose of the tower. The structure was patented by Dr. Charles A. R. Campbell, who built several such roosts around San Antonio from 1907 onward.

The tower stands on private land still held by Albert Steves' descendants, so it is seen from the road rather than visited up close; ask the owners before planning a stop. The concrete base is raised 7 feet (2.1 m) on piers, leaving room beneath for wagons, so the tower reads clearly from RM 473 about 1.5 miles east of Comfort.

Albert Steves coined the name from the Greek hygiea (health) and stasis (standing). The concrete base is raised 7 feet (2.1 m) so wagons could be driven underneath to collect guano, a detail easy to miss from the road.