Common NameBlack-bellied Whistling-Duck
Scientific NameDendrocygna autumnalis
Type of ReportRare Species
Date of Observation06/05/2018
MediaMedia
Number Observed2 adults
Reporting Observer's NameTheodore Murin
Mailing Address71 Irish Cove Road
South Burlington, VT 05403
United States
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Date Completed06/05/2018
Names & Emails of Other Contributing Observers

Larry Haugh (Shelburne, VT), Jim Mead (Williston, VT), Henry Trombley (Starksboro, VT)

Latitude of Observation (enter 0 if unable to provide)43.859
Longitude of Observation (enter 0 if unable to provide)-73.255
Place Namenear East Shoreham Covered Railroad Bridge
TownshipShoreham
CountyAddison
Time of Day03:45 PM
Length of Time Observedapprox 40 minutes
Maximum Estimated Distance from Bird (in feet)800
Minimum Estimated Distance from Bird (in feet)800
Noteworthy Weather Conditions

overcast, calm, roughly 60 degrees Fahrenheit

Optical Equipment Used for Observation

Zeiss 8x42 TFL binoculars; a Nikon 20-45x 60mm spotting scope; and a Celestron 8-inch Schmidt-Cassegrain telescope alternately fitted with a Celestron 18mm X-Cel LX eyepiece (effective 113x magnification) and a T-ring, T-adapter and Canon 400D digital camera (effective 64x magnification) mounted on a custom platform, Manfrotto 3066 video head, and Manfrotto 132XB heavy duty tripod.

Observer’s Previous Acquaintance With This or Similar Species

Saw many, possibly hundreds, recently in Texas.

I certify that any attachments included with this report were captured during this observation event​​.
Description of Habitat

Long, slender pond (apparently dammed stream) with cattail marsh and wooded edge adjacent to farm fields; spanned by covered railroad bridge and rural road bridge; houses not far away. No birds were closely associating and no interactions with other bird species were seen; a family of Canada Geese was swimming by possibly 500 feet away.

Behaviors Observed

Birds rested, slept and preened for entire observation period; birds looked at observers periodically but did not seem particularly interested in observers or surprisingly frequent car traffic ~800 feet away.

Description of Vocalizations

None heard

Verbal Narrative & Description of Observation

See photo. Two distinctly colored, long-legged and long-necked ducks were resting on a log which extended out of the water. Birds appeared nearly identical with the exception that one's belly and breast area appeared more distinctly and darkly marked - suggesting possible male and female - though apparently this field mark is more suggestive than reliable.

Relative Size & Shape

With no other birds nearby for reference, could only estimate as medium-sized ducks. Shape, however, was unusual due to long legs, upright posture and long necks.

Head

Crown strip cinnamon fading to dark on hind crown and nape; face and throat gray, eye dark, eye ring light.

Feet & Bill

Bill reddish pink with gray tip; concave top edge and generally similar in shape to Mallard. Legs long and light pink, toes and webbed feet pink.

Upper Back

Cinnamon

Lower Back & Rump

not seen

Wings

Not seen extended. Cinnamon scapulars, dirty cinnamon tertials, whitish and white coverts.

Breast, Belly, Flanks, Under Tail Coverts

Breast cinnamon with distinct delineation from black belly; flanks black; undertail whitish.

Tail

Tail black and somewhat spear shaped.

IMPORTANT: What similar species were eliminated when making the identification and how was this bird different?

Believe it would be difficult to confuse this distinct species with any other - see photo.

Other Notes & Comments

Belly and breast difference between the two suggests possibility of male and female - see note above.
Birds first discovered by Wesley Butler earlier in the day.
Report written from photos and memory.

This report was written from notes taken:Written from Memory