Re: Loss of Frank's Dump shorebird roost
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Thanks for the info Ben. It is most unfortunate that we have to choose between habitat for Snowy Plover and all migrant shorebirds, when before we were able to accommodate both. Is it because someone vandalized the water control structure last year that we still cannot let in a controlled amount of water that doesn't flood plover nests but allows for migrants to roost?
I know a lot of shorebirds roost at Eden Landing; however, those flocks don't penetrate north to Alameda South Shore (Elsie Roemer Bird Sanctuary, etc.), the Oakland shoreline, Albany mudflats, etc. As far as we know, all the small shorebirds that foraged in these more northern areas of the East Bay shoreline, roosted at Frank's Dump. The Eden Landing birds just don't "commute" that far north.
On Tuesday, July 5, 2022 at 06:46:59 PM PDT, Ben Pearl <bpearl@...> wrote:
As I did last year, I can provide clarification on the situation at Franks Dump. The pond is currently drier to support breeding snowy plovers, which as most of you know, are a federally threatened species (technically only the pacific coast distinct population segment, which extends 50 miles inland from the coast). I counted thirty plovers at Franks on Friday, which represents over 10% of the entire 9 county bayside population (~280) and over 1% of the entire coastal population (~2750)! We are monitoring a number of active nests on the pond, and based upon behavior observed on Friday, expect a couple more to be initiated soon. Included among the observed plovers were eight banded individuals, including one adult each from Point Reyes and Fort Ord State Beach, two juveniles and three adults from Eden Landing, and maybe most exciting of all, an adult that we banded at Franks Dump as a chick back in 2020 (2020 pic attached for cuteness)!
There is not a set date to add more water to the pond, but rather, it will be based upon when it is safe to do so without flooding out plover nests and/or placing young chicks at risk of predation (last year when water was added before all of the nests had hatched gulls ate one egg/chick that was last to hatch from the nest). We will continue to monitor the situation closely and work with EBRPD to determine when that is. As far as East Bay high tide roosts, I can only speak to the areas that we work at, but I can tell you that Eden Landing directly to the south of Hayward Shoreline provides an extensive amount of (and possibly overall better) habitat for shorebirds of all sizes. We regularly see mixed flocks of shorebirds that number in the many tens of thousands in just one managed or tidal pond. What makes Franks Dump unique is it being directly next to a mud flat and publicly accessible,resulting in the ability to look for rarities at high tide. Nevertheless, I would encourage you to visit the public areas of Eden Landing and see what you might find.
Aaron, as far as the large flock of willets you observed, I first noticed large numbers of returning shorebirds (including willets) at Eden Landing on June 21, and have since observed more shorebirds returning around the bay.
On Tue, Jul 5, 2022 at 5:17 PM Aaron Maizlish <amm.birdlists@...> wrote: