English
and Scientific names: |
Canada Goose Branta
canadensis
|
Number
of individuals: |
1,
age/sex unknown |
Locality:
LOUISIANA: |
Vermilion Parish |
Specific
Locality: |
Ca.
1.2 miles NNE of Wright, in the section bounded by the roads Maree Michel
(S), Meridian Line (E), Wright (W),
and Tom (N). |
Date(s)
when observed: |
02/06/2010 |
Time(s)
of day when observed: |
4:00-4:30
PM |
Reporting
observer and address: |
Paul
Conover Lafayette,
LA |
Other observers
accompanying reporter who also identified the bird(s): |
Dave
Patton |
Other observers who
independently identified the bird(s) |
None |
Light conditions
(position of bird in relation to shade and to direction and amount of light): |
Sunny.
The bird was to our north, the late afternoon sun to our southwest. Good
position, good angle. Basically, perfect light. |
Optical
equipment: |
Nikon
Fieldscope III with 20-60X zoom, also Nikon D50 with fieldscope adapter for
telephoto photography, and Sony camcorder for primitive videoscoping. |
Distance
to bird(s): |
My
estimate is about 100 yards. Dave is better at estimating distance; I’d go
with whatever he says. Through
the scope the image was beautiful, so the distance wasn’t a big factor. |
Duration
of observation: |
About
½ hour, although the bird wasn’t always visible. |
Habitat:
|
Rice
stubble field in an area of many square miles of such fields. |
Behavior
of bird: |
Bird
was in a major flock of geese, perhaps 20,000 birds. Birds were by turn
feeding, watching, milling around. This bird was by itself, and as we
watched, it wandered slowly to the W until it was the outermost bird in that
area of the flock. |
Description: |
A
“Canada” goose, i.e., a black-necked, white chin-strapped goose of the
Canada/Cackling Goose complex. The
bird was initially noted in the flock because it was one of the few non-Snow
Geese. It was also noteworthy because, with its neck outstretched, its head lifted
a few inches taller than the Snows around it. It was obvious at first glance
that its head shape was different from the more commonly found Cackling
Goose. The
black, somewhat glossy bill was longer and shaped differently than the more
Ross’s Goose-like bill of most Cacklings, and was slightly concave over its
length. The culmen was fairly straight on the basal 2/3, with a slight curve
that gave the bill its concave shape beyond that point. The bill base was
broad and thick; the outer third of the bill seemed to narrow slightly
dorsally and laterally. The
forehead sloped evenly to the bill in most postures. The
head and neck were all black except for the chinstrap. The anterior edge of
the chinstrap was fairly straight, without the forward bulge many
Richardson’s Cacklings show. There did not appear to be a break in the
chinstrap ventrally. The
breast was medium gray-brown, not dusky. There was no whitish neck collar. Otherwise,
the goose conformed to the basic color pattern of “Canada” geese. In
terms of overall size, this goose was similar to the Snow Geese. Its mantle
was at about the same height of the Snows, although its neck as slightly
longer. The body of the bird seemed slightly longer than the Snows, but as
can be seen in the tail-on view of this bird next to a Snow Goose, the body size
seems fairly even. At one point this bird was next to the lone Cackling Goose
noted, and this bird was decidedly larger, perhaps by ¼, and was clearly longer
necked and longer billed with a different head and bill shape. |
Voice: |
Not
heard. |
Similar species: |
Similar
species would be Cackling Goose. Cackling Goose is variable, but not even an
extreme bird should show this bill and head shape, or appear so consistently similar
to Snow Goose in mass. The
real question here, if this bird is judged to be a Canada Goose, is whether it
is a Giant Canada Goose, of which a feral population exists about 15 miles
away in Lake Arthur. I believe that a Giant Canada would appear noticeably larger
than the surrounding Snow Geese in all aspects. |
Photographs or tape
recordings obtained? |
Video
and photos attached. |
Previous experience with
this species: |
I’ve
seen many more Cacklings than Canadas, and the majority of Canadas I’ve seen
have been Giant Canadas. |
Identification
aids: |
Before
the sighting, I was aware of the separation points for Cackling and Canada,
and to a lesser extent, between subspecies of each. Afterwards I revisited some
sources including Steve Mlodinow’s NAB article on Cacklings +parvipes
Canada, and Sibley’s website on Canada vs. Cackling. |
This
description is written from: |
Memory
and study of images. |
Are you positive of your
identification? If not, explain: |
Yes.
I believe that Cackling and Giant Canada can be ruled out. |
Reporter:
|
Paul
Conover
|
Date
and time: |
Feb. 14, 2010 |