Bald Eagle Lake, 2 miles north of downtown White Bear Lake has a large roost of Purple Martins arriving each evening.  Take hwy 61 to 120th St (Cty Rd J).  Turn west then a quick left following signs to Bald Eagle Park.  Park in the parking lot and walk south to the floating dock.  There is an island of cattails about a 1/2 mile out.
Swallows can be seen arriving after 7:15 pm with the Martins streaming in from the east around 7:45 pm. By 8:15 the island & lake is covered with a swirling mass of birds.
Dennis Meyer
White Bear Lake