Tag Archives: Upper Green Islands

This Week’s Highlights and Shorebird High Counts, 8/9 – 8/18/2025

Suspected of breeding in 2022 and confirmed in 2023, a pair of American Oystercatchers has now nested annual on the tiny Upper Green Islands way up in Casco Bay off Yarmouth. On the 17th, our annual shorebird-focuses Birds of Casco Bay with Seacoast Tours collaboration documented a pair of adults with a juvenile once again. Since we discovered them on this tour in 2022, it’s been exciting to visit them each summer. Who would have thought this tiny island and ledge could support one of only a dozen or so pairs in the entire state?
Full trip report here.

Two birdwalks, two shorebird-centric tours, and two whale-watches made for a very nice, diverse array of observations of note for me over the last 10 days (see note in shorebird high counts):

  • 3 Long-tailed Ducks (2 continuing from previous week), Simpson’s Point, Brunswick, 8/9 (with Saturday Morning Birdwalk group).
  • 1 Bonaparte’s Gull and 6 Great Egrets, Sabattus Pond, 8/11 (with Jeannette).
We checked the underwing patterns of every Cory’s Shearwater we could.
  • 8/12 afternoon Puffin/Whale Combo cruise with Cap’n Fish’s Cruises out of Boothbay Harbor: 5 American Oystercatchers at Eastern Egg Rock. Offshore of EER = 104 Wilson’s Storm-Petrels,  6 Cory’s Shearwaters, 3 Great Shearwaters, 2 Northern Gannets, 1 MANX SHEARWATER.
  • 1-2+ Red Crossbills, Popham Beach State Park, Phippsburg, 8/14.
  • 1 molting adult Bay-breasted Warbler (more evidence of a limited molt-migration in Boreal birds to the southern coastal plain), Old Town House Park, North Yarmouth, 8/16 (with Saturday Morning Birdwalk group).

For my “shorebird high counts,” I prefer to visit at least one of each: high tide hotspot, low tide spot, “grasspiper spot,” and a freshwater location, and it must include a visit to local hotspots Wharton Point and the Walsh Preserve as I attempt to make these comparisons comparable week-to-week and year-to-year, which, for my own notes if nothing else, is why I put these together (but hope you find them of value, too). Just due to life and scheduling, it now often takes me more than a week to hit all of these “requirements,” so I am going to try and do every 10 days instead of weekly. Therefore, here are my high counts over these past 10 days:

  • American Oystercatcher: 5, Eastern Egg Rock, 8/12 (via Cap’n Fish’s Cruises Puffin/Whale combo trip). Plus 3 (2 ad with 1 juv), Upper Green Island, 8/17 (with Birds of Casco Bay with Seacoast Tours tour group). Photo above
  • Black-bellied Plover: 163, The Pool, Biddeford Pool, 8/18 (with Down East Adventures Shorebird Workshop group).
  • Killdeer: 13, Crystal Spring Farm, Brunswick, 8/9 (with Saturday Morning Birdwalk group).
  • Semipalmated Plover: 300+, The Pool, 8/18 (with Down East Adventures Shorebird Workshop group).
  • Piping Plover: 13, Popham Beach State Park, 8/14.
  • Ruddy Turnstone: 3, multiple locations this week.
  • Sanderling: 20, Popham Beach State Park, 8/14.
  • 1, Popham Beach State Park, 8/14 and 1 at Great Pond, Biddeford Pool, 8/18 (with Down East Adventures Shorebird Workshop group).
  • Least Sandpiper: 42, Sabattus Pond, 8/11 (with Jeannette).
  • White-rumped Sandpiper: 15, Hill’s Beach, Biddeford, 8/18 (with Down East Adventures Shorebird Workshop group).
  • Semipalmated Sandpiper: 1600, The Pool, 8/18 (with Down East Adventures Shorebird Workshop group).
  • Short-billed Dowitcher: 40, The Pool, 8/18 (with Down East Adventures Shorebird Workshop group).
  • Spotted Sandpiper: 4, Sabattus Pond, 8/11 (with Jeannette).
  • Lesser Yellowlegs: 66, Royal River, Yarmouth, 8/17 (with Birds of Casco Bay with Seacoast Tours tour group).
  • “Eastern” Willet: 24, Pine Point, Scarborough, 8/18 (with Down East Adventures Shorebird Workshop group).
  • “WESTERN” WILLET: 1 (FOY), Pine Point, 8/18 (with Down East Adventures Shorebird Workshop group).
  • Greater Yellowlegs: 22, Wharton Point, Brunswick, 8/9 (with Saturday Morning Birdwalk group).
Just including this Wilson’s Storm-Petrel photo here because it is incredible. Nice job, Bill!