by Bryce W. Robinson
For the past two weeks I stayed at a small cabin along the Bristol Bay coast of the Alaska Peninsula near the village of Egegik. I was part of an expedition to trap staging Bar-tailed Godwits (Limosa lapponica) led by the shorebird aficionado Dan Ruthrauff of USGS, accompanied by Lucas DeCicco, Stuart Fety, and Jaime Welfelt. We had poor luck with godwits, but had a spectacular time with the avifauna that was present. I have a lot of content to share from the expedition, and will start by sharing a clip of a Black-bellied Plover (Pluvialis squatarola) feeding on a beached Hydromedusae (Jellyfish).
Although not mentioned in any literature on diet of the Black-bellied Plover (so far as I’ve found), there is discussion of the behavior for Rock Sandpiper (Calidris ptilocnemis; Gill et al. 2002). Apparently the birds feed on the gonads of washed up jellyfish. There were many jellyfish that were left on the tidal flats each day as the tide receded, providing an ample food source for staging plovers preparing for the next leg of their fall migration.
Gill, Robert E., Pavel S. Tomkovich and Brian J. McCaffery. (2002). Rock Sandpiper (Calidris ptilocnemis), The Birds of North America (P. G. Rodewald, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America: https://birdsna.org/Species-Account/bna/species/rocsan