[cobirds] Great Blue Heron flock, Walden Ponds, Boulder County

This morning about 10:45 the Boulder Bird Club was at Walden Ponds and we observed a flock of birds off to the east, approximately over the White Rocks area.  We were able to watch them soar and identified them as Great Blue Herons.  Thankfully they worked their way toward us and we counted 65 - 70 of them.  At least 30 of them landed in Cottonwood Marsh while the rest of them continued southwest toward Sawhill Ponds.  After just a few minutes, the ones in the marsh flew off in the same direction as the rest of the flock.  It was something the 10 in our group have never before witnessed.

Sharon Norfleet

Louisville, Boulder County