English and Scientific names: |
Western Wood-Pewee (Contopus sordidulus)
|
Number of individuals: |
One in fresh juvenal plumage |
Locality: |
Cameron Parish |
Specific Locality: |
Peveto Beach Woods, ca. 3.5 mi. E of Johnson Bayou |
Date(s) when observed: |
23, 24 October 2010 |
Time(s) of day when observed: |
~ 12:15 -12:25 PM on 23 Oct, 11:00 – 11:30 AM on 24 Oct |
Reporting observer and address: |
Devin Bosler Lancaster, PA 17601 |
Other observers
accompanying reporter who also identified the bird(s): |
None |
Other observers who
independently identified the bird(s) |
None. James Beck’s photos from 19 and 27 Oct were NOT of
this particular individual and appeared to be a dark Eastern in my opinion. |
Light conditions
(position of bird in relation to shade and to direction and amount of light): |
Clear sky with optimal late morning sunlight. Increasing cloud cover on 24 Oct. Sun angle high and behind observer. |
Optical equipment: |
Zeiss Victory FL 8x42, Kowa TSN
881 Angled 88mm scope w/ 20-60x optical zoom, Canon Powershot SD1100 IS digital camera (all equipment in
excellent condition). |
Distance to bird(s): |
ca. 20-25 meters |
Duration of observation: |
~ 10-15 min. on 23 Oct, 30 min. on 24 Oct |
Habitat: |
Heavily disturbed, fragmented mature coastal chenier
woodlot. Live oak-hackberry-honeylocust dominated canopy with extensive herbaceous
understory of ragweed-baccharis-camphorweed-goldenrod. |
Behavior of bird: |
Actively fly-catching from highest dead branches of live
oaks and hackberries. Returning to a
few favored perches. Silent throughout
encounter despite interactions with an Eastern Wood-Pewee (Contopus virens). Relocated in same vicinity the following
day. Observed at rest and in flight. |
Description: |
Very dark pewee in fresh plumage. Overall plumage cold, dark brown lacking
any olive-green tones. Underparts,
especially throat and breast, equally dark with solid dark gray-brown breast
band. Very indistinct light
brown-cinnamon wing bars contrasting minimally with dark wing. Dark centers to undertail coverts. Dark brown irides. Entirely dark bill with pale orange
restricted to base of lower mandible.
Dark gray legs and feet. Adults in worn plumage during fall migration. |
Voice: |
Silent. |
Similar species: |
Very similar to Eastern Wood-Pewee (EAWP), however, there
are separable plumage/bare part/posture characteristics to be considered. This individual much darker overall than
any fresh juvenal EAWP in my experience.
EAWP can be eliminated by lack of split breast band and darkness of
throat, breast, etc. Darkness of head
lacking any olive-green tones also favors WEWP. EAWP in fresh plumage would show relatively
bright, pale, contrasty wingbars
as opposed to this individual. EAWP,
in general, lack dark centers on undertail coverts exhibited by this
individual. Almost entirely dark lower
mandible inconsistent with EAWP. Structure/posture differences are more subjective but
still useful. WEWP perches with a more
upright, less languid posture. Perhaps
an artifact of shorter tail to wing tip ratio, the tail does not droop when
perched as in EAWP. This renders a
more straight-backed appearance in WEWP. |
Photographs or tape recordings
obtained? |
Digiscoped photos by Devin
Bosler. Yes, photos attached. |
Previous experience with
this species: |
Prior experience with this species from breeding grounds
only. Observed in several Western
states. |
Identification aids: |
National Geographic Complete Birds of N.A. (Alderfer et al. 2005) |
This description is written from: |
notes
made during the observation, notes made after the observation, memory. |
Are you positive of your
identification? If not, explain: |
Yes, confident. |
Date and time: |
2 November 2010 Time:
11:30 PM CDT |