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 Goose | 4 -- a family of "snow" morphs
(P) |
| Canada Goose | 800 in scattered groups
(F, P, B, M) |
| Tundra Swan | 300 (P), 18000 spread over the lake (M) -- with very few
young |
| Wood Duck | 5 in canals in pocosin
(A) |
| Green-winged Teal | 400 (P, B,
M) |
| American Black Duck | 300 -- many in
pairs (P, B, M) |
| Mallard | 35 (P, B, M) |
| Northern Pintail | 200 (N, P, B),
500 (M) |
| Northern Shoveler | 40 -- most males still
partially in drab plumage (P, B, M) |
| Gadwall | 500 in small groups scattered
among flocks of other species (P, B, M) |
| Eurasian Wigeon | 1
male (B) |
| American Wigeon | 50 (P), 400 (B), 2000 (M)
|
| Canvasback | 40 far out on
Lake Mattamuskeet (M) |
| Redhead | 1 (A), 1 male in
drab plumage (M) |
| Ring-necked Duck | 90 on ponds
(F), 2 (M) -- two females (F, M) had aberrant white patches on the
face! |
| Greater Scaup | 20 migrating
southward (N) |
| Lesser Scaup | 20 migrating
southward (P) plus 10 unidentified scaup far out on Lake
Mattamuskeet |
| Black Scoter | 800 migrating southward in
undulating lines over the ocean in flocks of up to 300 (N, P) |
| Surf Scoter | 2 females with Black
Scoters (N) |
| Bufflehead | 120 including a few males (N,
P, M) |
| Hooded Merganser | 37 (F, P, B, M)
|
| Red-breasted Merganser | 30 (N, P)
|
| Ruddy Duck | 20 (P, M)
|
| Northern Bobwhite | 1 rally call heard from
large fields (M) -- later a European Starling imitated the rally
call |
| Red-throated Loon | 70 migrating southward, including flocks of 14 and 22 (N) |
| Pacific or Arctic
Loon | 1 on the ocean close to shore Saturday afternoon (see notes above)
(N) |
| Common Loon | 20 migrating southward (N) |
| Pied-billed Grebe | 60 (F, P, B, M) |
| Red-necked Grebe | 1 close to shore Saturday afternoon, a northern species rare in
winter in NC (N) |
| Northern Gannet | 500 migrating southward
over the ocean and diving from a height at sea (N, P) |
| American White
Pelican | 42 including clear demonstrations of coordinated feeding (P, M) |
| Brown Pelican | 150 or so along the beach
and in the ponds (N, P) |
| Double-crested Cormorant | 3000 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 Heron | 30 (F, B, P,
M) |
| Great Egret | 75 including one watched
fishing beside the road (N, P, B, M) |
| Snowy Egret | 30 including several feeding
with avocets (P, M) |
| Tricolored Heron | 8 (P, B, M) |
| Black-crowned Night-Heron | 2 immatures (O,
M) |
| White Ibis | 35 (P, M) |
| Black Vulture | 1 (F), 2 (M) |
| Turkey Vulture | 50 or more scattered on
the mainland |
| Osprey | 3 including one ripping
apart a fish it had caught |
| Bald Eagle | 11 including 2 immatures that
flushed all the ducks on Bodie Island pond (F, P, B, M) |
| Northern Harrier | 8 females (one adult) (P,
B), 2 males (adult), 1 immature female (M) |
| Sharp-shinned Hawk | 2 (F) |
| Red-shouldered Hawk | 1 (F)
|
| Red-tailed Hawk | 14 (F), 3 (M)
|
| American Kestrel | 12 (F, M) |
| Merlin | 1 male perched in plain view in
pocosin (A) |
| Clapper Rail | 1 seen clearly
in Spartina (O) |
| King Rail | 1 called (regular train) in
cattails (B) |
| Virginia Rail | 1 called (regular train
higher than King Rail's) (B), 1 called (descending oinks) (M) |
| Sora | 1 glimpsed in cattails and then
flying over the boardwalk with keek calls (B) |
| American Coot | 3000 in dense flocks (P,
M) |
| Black-bellied Plover | 4 (N, O, P) |
| Semipalmated Plover | 1 (O) |
| Killdeer | 60 (F, B, M) |
| American Avocet | 150 including a group of
90 feeding in a dense moving pack (P) |
| Willet | 8 on the beach (N, P) |
| Marbled Godwit | 13 in the distance on Salt
Flats (P) |
| Sanderling | 150 on beaches (N,
P) |
| Dunlin | 2 on the beach (P) |
| Laughing Gull | 50 (N, M) |
| Bonaparte's Gull | 2 (N) |
| Ring-billed Gull | 500 on beaches, ponds,
plowed agricultural fields (F, N, B, P, O, M) |
| Herring Gull | 200 including many in a roost
of 400 gulls at Oregon Inlet (N, P, O) |
| Great Black-backed Gull | 200 including many
in a roost of 400 gulls at Oregon Inlet
(N, P, O, M) |
| Lesser Black-backed
Gull | 4 including both adults and immatures all off course from
Europe (N, O) |
| Royal Tern | 2 lingering before
migrating southward (N) |
| Forster's Tern | 4 (N), 4 (M) |
| Rock Pigeon | feral pigeons around highway
bridges and piers -- a domesticated species from Europe |
| Mourning Dove | 20 scattered on the
coast and inland |
| Belted Kingfisher | 12 including one with a
4-inch fish (F, P, B, M) |
| Red-bellied Woodpecker | 4
(M) |
| Downy Woodpecker | 1 (M) |
| Northern Flicker | 8
scattered (F, P, M) |
| Pileated Woodpecker | 1 called once
(M) |
| Eastern Phoebe | 3 (M) |
| Blue Jay | 2 (M) |
| American Crow | 20 (F) |
| Fish Crow | 20 (M) |
| Horned Lark | 2 --
a western species scarce in NC (O)
| | Tree Swallow | 25 (P, M)
| | Cave
Swallow | 1 -- a straggler from either the Caribbean or southern
Texas (P) |
| Carolina Chickadee | 2 (M) |
| Red-breasted
Nuthatch | 1 in Slash Pines with warblers, a northern species
irregular in winter in NC (B) |
| Carolina Wren | 2 (N, B, M) |
| House Wren | 1 (P) |
| Sedge Wren | 1 calling in saltmarsh
(P) |
| Marsh Wren | 3 including two that allowed
clear looks (B, M) |
| Ruby-crowned Kinglet | 2 (M) |
| Eastern Bluebird | 30 (F, M) |
| American Robin | 30 (F, A, M) |
| Brown Thrasher | 2 (M) |
| Northern Mockingbird | 25 (F, N, B,
M) |
| European Starling | 600 or more in flocks
everywhere -- an invasive species introduced from Europe |
| Yellow Warbler | 1
female, observed by Rob and Sumit, which should have migrated south by now
(M) |
| Yellow-rumped Warbler | 150 here for the
winter often in small loose flocks everywhere there were trees or
bushes |
| Palm Warbler | 2 (M) |
| Common Yellowthroat | 4 (P, M) |
| Northern Cardinal | 2 (M) |
| Eastern Towhee | 2 (N, B) |
| Savannah Sparrow | 1 on a power
line by large fields (M) |
| Fox Sparrow | 1 found by Dan on the
causeway (M) |
| Song Sparrow | 20 (F, P, M) |
| Swamp Sparrow | 12 in marshes and beside
canals (P, M) |
| Song Sparrow | 5 including a few songs (P,
M) |
| Red-winged Blackbird | 2000 including two
large flocks (F, P, M) |
| Eastern Meadowlark | 40 in grassy
places (F, P, M) |
| Rusty Blackbird | 20 with other blackbirds
(M) |
| Boat-tailed Grackle | 200 including
both males and females (N, P, M) |
| Common Grackle | 2000 mostly
in large flocks (F, M) |
| Brown-headed Cowbird | 10 (M) |
| House Sparrow | 10 -- an invasive species
introduced from California (N, P) |
| American Goldfinch | 1 flying overhead
(M) |
| House Sparrow | 4 -- an invasive species
Introduced from Europe (F, N) |
| | |
| TOTAL SPECIES | 116 |
| | |

Reptilia
| | |
---|
| Yellow-bellied Slider Trachemys
scripta | many (P, M) |
| Common Snapping Turtle Chelydra
serpentina | 1 (P) |
| | |

Mammals
| | |
| Nutria | 1 -- an invasive species
introduced from Argentina (M) |
| White-tailed Deer | 10
(F, M) |
| Bottlenose Dolphin | 50 migrating
southward in small pods (N) |
| Raccoon | 1 exploring the edge of
a pond (P) |
| Gray Fox | 1 on the beach in
front of the Sea Foam Motel (N), 1 beautiful recent road-kill (M) |

|