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Checklist S10359802

 
Location
Monhegan Island, Lincoln County, Maine, US ( Map ) ( Hotspot )
Date and Effort
Thu Dec 22, 1988 7:15 AM
Protocol:
Traveling
Party Size:
4
Duration:
8 hour(s), 30 minute(s)
Distance:
12.0 mile(s)
Observers:
Peter Vickery
Comments:
PDV, Jeff Wells, Charlie Duncan, and Ilze Balodis conducted the Monhegan Island CBC.
Species
41 species (+2 other taxa) total
11
25
315
5

number noted as unusual.

1
0
0
23
7
3
12
14
1
1
4
1

noted as unusual.

0
0
169
36
750
305
3
3

number noted as unusual.

235
1
Larus sp.

We reported a Thayer's Gull on this count. My noted from Maine Bird Notes 2:39 read: First struck me as a dark iceland Gull with notably dark primaries. Head, neck, and underparts off-white, perhaps a slightly creamier tone than the typically white Iceland. Mantle and wing coverts slightly darker, with a more conspicuous gray-brown patterning than the underparts. Upper surface of primary tips was a darker smoky gray-brown, clearly not the blackish color of first-winter Herring Gull. Undersurface of primaries silvery-gray. In flight, smoky gray-brown secondaries contrasted with the paler secondary coverts. gray-brown tail, not obviously mottled or banded, contrasted with the patterned and paler uppertail coverts. When perched, bird was slightly smaller than herring Gull; head rounder; wings projected a bit further; bill clearly shorter. Bill dark, with a small fleshy area restricted to the base. Compared to adult Iceland Gull, bill was the same length but a bit stubbier. Eye dark, legs pink. Other than the slightly thicker bill and darker mantle, this bird struck me as an Iceland Gull - which may reflect Thayer's Gull taxonomic status. Observed for 30 minutes at distances ranging from 10 to 40 meters with 8x binoculars and 50x Questar scope.

2012: It seems to me that this description does not convincingly match Thayer's Gull but is consistent with Kumlien's Gull. I think this observation should remain as Larus sp.

1

my notes that appeared in Maine Bird Notes 2:34 read: first observed amid a group of four Common Loons. This individual was smaller, perhaps by 10 - 15%. Most obvious feature was the rounded crown and nape, quite unlike Common's blocky head-shape. Small, thin bill, obviously tiny in comparison to Common's, appeared bluish or gray. Dark gray crown and nape, a shade or two lighter than Common's, contrasted with blackish mantle. Dark feathering extended from crown to bill, completely obscuring the eye. White area on face was restricted: limited to the throat and lower cheeks. Dark feathering on side of neck more extensive than on Common; demarcation between the restricted white throat, neck and upper breast was sharply defined. Dark upperparts extended to the waterline; no obvious flank patches were noted. Identified as Pacific Loon (Gavia pacifica) on the basis of range. No known characters separated it from Arctic Loon (G. arctica). No photographs taken.

24
1
29
1
1
2
1

noted as unusual.

12
31
7
37
14
2
4
1
16
1
3
7
9
 

Are you submitting a complete checklist of the birds you were able to identify?

Yes