Flight: 8:10 pm

17 mins after sunset (about at dark on a Mostly Cloudy evening) ~36% of the colony flew – some went 4 miles SW while most went 18 miles SSE (~7% of them went to altitude) on N Winds at 5 mph – had been Light & Variable turning NW at 8 mph around 4:30pm, Mostly Cloudy, Temp 87°F, Dew Point 69°F steady, 18 Cooling Degree Days, Cloud Base 4104′, RH 55% rising, Heat Index 91°F, BP 29.94 steady, sea level pressure 1012.8 mb steady, bats viewable until 9:23 pm under streetlights