[SBB] Alviso Swallows

Good Morning,

For more than a week now at the intersection of Elizabeth and Hope Sts in Alviso there has been an amazing congregation of swallows. The best time for viewing seems to be around noon when the majority of the flock tends to be settling on the powerlines around the intersection. A very rough estimate is that about 80% are Barn Swallows, 15% Violet Greens, and the remaining 5% is a mix of Tree Swallows and Northern Rough-winged Swallows. Also not settling on the lines, but present none-the-less are many swifts the majority of which are Vaux's, but with an occasional White-throated present. Admitting my inexperience in estimating the number of birds in a swarm of swallows I would say there are times when there are close to 500 birds present. Also, Mike Mammoser posted a Bank swallow that he saw a couple of days ago. I have looked every day during the peak powerline settling time and have not seen it again, although I would be surprised if we didn't find more bank swallows if the flock sticks around. I thought I would let everyone know in case there are some Hirundinidae lovers out there who would like to see the spectacle.