Bay Area/ North SF Bay Area/ Parks & Nature
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Published on June 23, 2024
Point Reyes Snowy Plover Population Boosted by Discovery of New Nests Despite Raven PredationSource: National Park Service

In Point Reyes National Seashore, the snowy plover population received some promising news as biologists reported the discovery of multiple new nests along the coastline. The National Park Service's latest update highlighted two new nests between the Abbotts Lagoon mouth and the North Beach parking lot, contributing to the season's total count of 33.

Despite the overcast conditions, the seabird's breeding efforts seem to be soaring, with an impressive tally of 14 confirmed-fledged chicks—a number that stands significantly above average for the area. It's a notable spike in the small shorebird's chances for survival, though some plover parents are still on the lookout for confirmation of the whereabouts of their offspring's color band combinations. With these figures on a positive trajectory, expectations are high for an ensuing surge in new nests.

The fledging success, however, is shadowed by predation pressures, primarily from common ravens. The Point Blue biologists noted that two instances of raven attacks were particularly troubling. One such event was a vivid scene where a raven chased and captured a juvenile plover along North Beach. Another nest on Limantour Spit suffered a heavy loss as evidence pointed towards the likeliness of a raven attack, inferring the adult female incubating the eggs was preyed on – a significant hit to the breeding population.

The predations have prompted a re-evaluation of conservation strategies by removing exclosures around nests on Limantour Spit to possibly deter the predators' attention. Moreover, biologists are resorting to trap cameras, setting them up to watch the nesting activities closely and to study predator patterns more extensively.

As noted in the park's update, individuals are encouraged to email Matt Lau for additional information or inquiries about the snowy plovers at Point Reyes.