IKLland Posted May 23 Share Posted May 23 2 minutes ago, DLecy said: Correct. In the most basic terms, in the spring there are usually persistent NW winds, hindering bird movement (they are heading NNW after all). When the winds shift to coming out of the south, it creates a little bit of a window where birds can ride the proverbial escalator to the breeding grounds. This is when you get huge days of migrants at the Outer Point. Sometimes low winds days can produce this as phenomena as well. The reverse tends to hold true in the fall. The strong NW winds create a great and easy train for the birds to ride heading southbound. Strong south winds hold all of that up, and birds stop over to rest and refuel, creating great conditions. This is how it was explained to me out here, but I have no experience as to whether or not this holds up true and down the coast of CA, OR, and Wa, for example. And, there is always exceptions to the rule or great birds that show up out of nowhere...but this is the general rule of thumb. Thanks! What about for vagrants from the east? Quote Link to comment Share on other sites More sharing options...
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