Island Girl flew 330 km (205 miles) on Sunday, reaching a point about half way across the continental United States en route to the Gulf of Mexico.
She roosted on a forested ridge in broken farmland at about 1,042' elevation and about 14 miles SW of Rolla, Missouri and Highway 44.
She left the Mississippi behind and has veered towards a more southerly course.
Her 11th roost site was just 140 miles NW of her seventh roost last year, so she is moving slower but still following a similar route down the central flyway.
By this time last year, she had already reached the Gulf.