Date: 9/29/19 8:32 am From: David Apgar <d_apgar...> Subject: [MBBIRDS] Re: Monterey County vs. Santa Cruz County fall migration mystery
A good question, not least because the opposite occurs in Cape May, where rarities pile up in spring and especially autumn migration on the northern side of the water gap created by the widening Delaware River that separates Cape May hot spots like Higbee Beach from the Delaware shoreline.
From: <mbbirds...> <mbbirds...> on behalf of Randy Wardle <wrwardle...>
Sent: Saturday, September 28, 2019 8:23 PM
To: Monterey Bay Birdlist <mbbirds...>
Subject: [MBBIRDS] Monterey County vs. Santa Cruz County fall migration mystery
Looking at the Monterey County rarities that have been found the past several days, we see species such as Red-eyed Vireo, Yellow-throated Vireo, Plumbeous Vireo, Painted Bunting, and warblers such as, Black and White, Virginia, Blackpoll, Chestnut-sided, Tennessee, and Prairie, along with today's find of a Great-crested Flycatcher. Meanwhile, in Santa Cruz County we have the continuing Red-footed Booby that has been here for almost a year and one White-throated Sparrow in my back yard. I cannot figure out why there are not more fall migration rarities spotted in Santa Cruz County. With over 10,000 eBird reports so far this year, it's not like there aren't enough birders out searching for rarities. For some reason, which escapes me, Santa Cruz County seems to get bypassed by many of the rare species during their fall southern migration. I have heard that many warblers and other land species have been seen landing on boats out in the bay during this time of year to rest. This begs the question...Do most migrating species fly south directly over Monterey Bay waters from somewhere up the coast to the area around the Monterey Peninsula where they stop to rest? Why is it that every year so many more rare species are found during migration in the Monterey/Carmel/Pacific Grove area than in Santa Cruz County. Does anyone know the answer to this question? I would be very interested in hearing from other birders as to why they think this migration phenomena happens year after year.