Migration

I managed to catch the first small swarm of snow geese migrating into Freezeout Lake near Choteau, MT. Each spring as many as 30,000 geese and tundra swans will rest here over about a two week span. I waited for nearly 1.5 hours to cath the swarm take of, circle in a swell and contracting maner overhead only to land on the ice again. I took a full series of shots numbering nearly 200 shots of this beautiful display. The Rocky Mountain front is in the background. To ensure I captured their darting flight cleanly I chose to employ the shutter priority setting and set a speed of 1/500 sec exposure....the camera then chose the correct ISO and apeture to compose the shot. Canon 50D with Sigma 18-250mm lens fully zoomed.