Vertebrates at Pea Island NWR and Mattamuskeet NWR
(also Alligator River NWR, Nags Head, Bodie Island Pond, and en route)

November 19-21, 2010

Weather

  • November 19:   clear, sunny, calm, 50s
  • November 20:   clear, sunny, light WSW breeze, 60s
  • November 21:   clear, sunny, calm, 60s
  • Drivers and helpers: Rob Aldredge, Dan McGillen, Cris Ledon-Rettig, Sumit Dhole

Some highlights and notes ...

  • This weekend had the most spectacular weather (sunny, calm, cool) we have ever had in November on the Outer Banks.   Especially important was the light wind that often fell to a dead calm.   The ocean was slightly rippled on Saturday and glassy calm on Sunday, and Lake Mattamuskeet was like a mirror.   As a result, birds were easy to sea on the ocean, and thousands of swans and ducks had spread over most of Lake Mattamuskeet (at least east of the causeway).

  • Wintering waterfowl (Anseriformes) make the national wildlife refuges in northeastern NC famous.   We found 23 species altogether -- one species of swan, 2 species of geese, and 20 species of ducks (9 species of up-enders, 11 species of divers).  

  • American White Pelicans and American Avocets put on great displays of their specialized coordinated feeding.   We saw the pelicans feeding in shoulder-to-shoulder formation both at Pea Island and at close range at Lake Mattamuskeet.   The avocets fed in a dense moving pack with their bills sweeping the water in front.   Several Snowy Egrets joined the avocets but periodically had to fly over the pack to reach the front again.

  • Southward migration over the ocean was in full swing.   Loons (both Red-throatd and Common), Black Scoters, Northern Gannets, Laughing Gulls, and Bottlenose Dolphins passed the Sea Foam Motel in steady streams early in the morning.   The scoters flew in long undulating flocks, sometimes consisting of 200-300 birds.   For awhile just before noon, we watched gannets feeding at sea, by diving like spears from 50 or 80 feet high.

  • A surprising number of birds off the usual route for migration had found their way to the Outer Banks this weekend.   These included the Eurasian Wigeon and Lesser Black-backed Gulls from across the Atlantic, the Red-necked Grebe and Red-breasted Nuthatch from farther north, the Horned Lark from farther west, the Cave Swallow from the Caribbean or Mexico, the Yellow Warbler that should have been far to the south, and especially the Pacific or Arctic Loon.

  • For a variety of reasons, few students saw these unusual birds.   This trip makes the point that biodiversity often depends on the number of rare (but nevertheless regularly occurring) species.

  • The Pacific or Arctic Loon (right in front of the Sea Foam on Saturday afternoon) was especially unexpected.   The Pacific Loon, from the west coast, appears in NC once every year or two, but the Arctic Loon (called Black-throated Diver in the UK), from either Europe or Siberia, has never been seen in NC and perhaps only a few times on the east coast of North America.   The two species are very closely related and replace each other near the Bering Strait -- Arctic Loon nests in the Old World arctic, Pacific Loon in the New World arctic -- the two species are thus almost parapatric (almost, because they apparently overlap in a small area of Alaska and eastern Siberia).   In winter, they are hard to tell apart, but the bird in front of the Sea Foam had one prominent characteristic of the Arctic Loon -- a conspicuous white patch on the flanks.   Regardless of which species it is, this bird is one of the most unexpected birds ever encountered on a Vertebrate Field Zoology trip.

  • An ususual feature of this trip was the number of species of rails seen or heard -- four species (Clapper, King, Virginia, Sora) of these common birds that are almost never seen because they hide so efficiently in the dense vegetation of marshes.   They are the model for the saying "thin as a rail" -- they can indeed flatten their bodies from side to side to allow them to slip between the grass stems!

  • At Lake Mattamuskeet, the Tundra Swans had spread over the lake -- we saw perhaps 18,000 (16,000-20,000) of them (probably half of the population wintering in eastern North America!).   There were remarkably few immatures among them, but those few were clearly with their parents, except for two that appeared to be orphaned.   The demography of the Tundra Swans will be a topic for discussion at our last meeting!

In the lists below . . .

  • F = borrow ponds along US 64 from Tarrboro to Columbia (Friday)
  • A = Alligator River NWR
  • N = Nags Head (near the Sea Foam Motel on the beach or over the ocean)
  • B = Bodie Island Pond
  • O = Oregon Inlet (jetty and nearby beach and dunes)
  • M = Mattamuskeet NWR

Please send additions/corrections to Haven Wiley

Birds

Names and sequence follow the Checklist of North American Birds (American Ornithologists' Union, November 2010)

Snow Goose4 -- a family of "snow" morphs (P)
Canada Goose800 in scattered groups (F, P, B, M)
Tundra Swan300 (P), 18000 spread over the lake (M) -- with very few young
Wood Duck5 in canals in pocosin (A)
Green-winged Teal400 (P, B, M)
American Black Duck300 -- many in pairs (P, B, M)
Mallard35 (P, B, M)
Northern Pintail200 (N, P, B), 500 (M)
Northern Shoveler40 -- most males still partially in drab plumage (P, B, M)
Gadwall500 in small groups scattered among flocks of other species (P, B, M)
Eurasian Wigeon1 male (B)
American Wigeon50 (P), 400 (B), 2000 (M)
Canvasback40 far out on Lake Mattamuskeet (M)
Redhead1 (A), 1 male in drab plumage (M)
Ring-necked Duck90 on ponds (F), 2 (M) -- two females (F, M) had aberrant white patches on the face!
Greater Scaup20 migrating southward (N)
Lesser Scaup20 migrating southward (P) plus 10 unidentified scaup far out on Lake Mattamuskeet
Black Scoter800 migrating southward in undulating lines over the ocean in flocks of up to 300 (N, P)
Surf Scoter2 females with Black Scoters (N)
Bufflehead120 including a few males (N, P, M)
Hooded Merganser37 (F, P, B, M)
Red-breasted Merganser30 (N, P)
Ruddy Duck20 (P, M)
Northern Bobwhite1 rally call heard from large fields (M) -- later a European Starling imitated the rally call
Red-throated Loon70 migrating southward, including flocks of 14 and 22 (N)
Pacific or Arctic Loon1 on the ocean close to shore Saturday afternoon (see notes above) (N)
Common Loon20 migrating southward (N)
Pied-billed Grebe60 (F, P, B, M)
Red-necked Grebe1 close to shore Saturday afternoon, a northern species rare in winter in NC (N)
Northern Gannet500 migrating southward over the ocean and diving from a height at sea (N, P)
American White Pelican42 including clear demonstrations of coordinated feeding (P, M)
Brown Pelican150 or so along the beach and in the ponds (N, P)
Double-crested Cormorant3000 scattered everywhere, roosting in flocks on ponds, drying wings in the sunshine, over 1000 entering Oregon Inlet at evening (N, P, B, O, M)
Great Blue Heron30 (F, B, P, M)
Great Egret75 including one watched fishing beside the road (N, P, B, M)
Snowy Egret30 including several feeding with avocets (P, M)
Tricolored Heron8 (P, B, M)
Black-crowned Night-Heron2 immatures (O, M)
White Ibis35 (P, M)
Black Vulture1 (F), 2 (M)
Turkey Vulture50 or more scattered on the mainland
Osprey3 including one ripping apart a fish it had caught
Bald Eagle11 including 2 immatures that flushed all the ducks on Bodie Island pond (F, P, B, M)
Northern Harrier8 females (one adult) (P, B), 2 males (adult), 1 immature female (M)
Sharp-shinned Hawk2 (F)
Red-shouldered Hawk1 (F)
Red-tailed Hawk14 (F), 3 (M)
American Kestrel12 (F, M)
Merlin1 male perched in plain view in pocosin (A)
Clapper Rail1 seen clearly in Spartina (O)
King Rail1 called (regular train) in cattails (B)
Virginia Rail1 called (regular train higher than King Rail's) (B), 1 called (descending oinks) (M)
Sora1 glimpsed in cattails and then flying over the boardwalk with keek calls (B)
American Coot3000 in dense flocks (P, M)
Black-bellied Plover4 (N, O, P)
Semipalmated Plover1 (O)
Killdeer60 (F, B, M)
American Avocet150 including a group of 90 feeding in a dense moving pack (P)
Willet8 on the beach (N, P)
Marbled Godwit13 in the distance on Salt Flats (P)
Sanderling150 on beaches (N, P)
Dunlin2 on the beach (P)
Laughing Gull50 (N, M)
Bonaparte's Gull2 (N)
Ring-billed Gull500 on beaches, ponds, plowed agricultural fields (F, N, B, P, O, M)
Herring Gull200 including many in a roost of 400 gulls at Oregon Inlet (N, P, O)
Great Black-backed Gull200 including many in a roost of 400 gulls at Oregon Inlet (N, P, O, M)
Lesser Black-backed Gull4 including both adults and immatures all off course from Europe (N, O)
Royal Tern2 lingering before migrating southward (N)
Forster's Tern4 (N), 4 (M)
Rock Pigeonferal pigeons around highway bridges and piers -- a domesticated species from Europe
Mourning Dove20 scattered on the coast and inland
Belted Kingfisher12 including one with a 4-inch fish (F, P, B, M)
Red-bellied Woodpecker4 (M)
Downy Woodpecker1 (M)
Northern Flicker8 scattered (F, P, M)
Pileated Woodpecker1 called once (M)
Eastern Phoebe3 (M)
Blue Jay2 (M)
American Crow20 (F)
Fish Crow20 (M)
Horned Lark2 -- a western species scarce in NC (O)
Tree Swallow25 (P, M)
Cave Swallow1 -- a straggler from either the Caribbean or southern Texas (P)
Carolina Chickadee2 (M)
Red-breasted Nuthatch1 in Slash Pines with warblers, a northern species irregular in winter in NC (B)
Carolina Wren2 (N, B, M)
House Wren1 (P)
Sedge Wren1 calling in saltmarsh (P)
Marsh Wren3 including two that allowed clear looks (B, M)
Ruby-crowned Kinglet2 (M)
Eastern Bluebird30 (F, M)
American Robin30 (F, A, M)
Brown Thrasher2 (M)
Northern Mockingbird25 (F, N, B, M)
European Starling600 or more in flocks everywhere -- an invasive species introduced from Europe
Yellow Warbler1 female, observed by Rob and Sumit, which should have migrated south by now (M)
Yellow-rumped Warbler150 here for the winter often in small loose flocks everywhere there were trees or bushes
Palm Warbler2 (M)
Common Yellowthroat4 (P, M)
Northern Cardinal2 (M)
Eastern Towhee2 (N, B)
Savannah Sparrow1 on a power line by large fields (M)
Fox Sparrow1 found by Dan on the causeway (M)
Song Sparrow20 (F, P, M)
Swamp Sparrow12 in marshes and beside canals (P, M)
Song Sparrow5 including a few songs (P, M)
Red-winged Blackbird2000 including two large flocks (F, P, M)
Eastern Meadowlark40 in grassy places (F, P, M)
Rusty Blackbird20 with other blackbirds (M)
Boat-tailed Grackle200 including both males and females (N, P, M)
Common Grackle2000 mostly in large flocks (F, M)
Brown-headed Cowbird10 (M)
House Sparrow10 -- an invasive species introduced from California (N, P)
American Goldfinch1 flying overhead (M)
House Sparrow4 -- an invasive species Introduced from Europe (F, N)
TOTAL SPECIES116

Reptilia

Yellow-bellied Slider Trachemys scriptamany (P, M)
Common Snapping Turtle Chelydra serpentina1 (P)

Mammals

Nutria1 -- an invasive species introduced from Argentina (M)
White-tailed Deer10 (F, M)
Bottlenose Dolphin50 migrating southward in small pods (N)
Raccoon1 exploring the edge of a pond (P)
Gray Fox1 on the beach in front of the Sea Foam Motel (N), 1 beautiful recent road-kill (M)