At dusk, April through October, millions of these mammals fly out from under the Congress Ave. Bridge to feed
The birds decide to make flying animals out of these mammals, the flying ... on or 
near the Congress Avenue Bridge to view the cloud of millions... [DOC] [TLE] Ways to Watch the Bats Emerge at Dusk - LiveMom.com [PAR] Jul 31, 2015 ... A bat's eye view from the Ann Richards Congress Avenue Bridge, ... Austin watch 
these winged mammals head out to get their dinner.