English and Scientific names: |
Sage Thrasher (Oreoscoptes montanus)
|
Number of individuals: |
One in fresh basic, age/sex
unknown (though presumed adult on basis of plumage characteristics, i.e.
extent and darkness of streaking on underparts) |
Locality: |
Cameron Parish |
Specific Locality: |
Blue Goose Trail parking
area off LA-27 nr. Sabine NWR Business Office bldg. (former hdqtrs.) |
Date(s) when observed: |
23 October 2010 |
Time(s) of day when observed: |
~1:45 – 2:30 PM CDT |
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) |
Robby Bacon (originally
discovered on 22 Oct), Matt and Gary Pontiff, m. ob. |
Light conditions
(position of bird in relation to shade and to direction and amount of light): |
Clear sky with optimal
midday/early PM sunlight. Sun angle relatively
high and behind observer. Backlighting
and sun glare not a factor. |
Optical equipment: |
Zeiss Victory FL 8x42, Kowa
TSN 881 Angled 88mm scope w/ 20-60x optical zoom, Canon Powershot SD1100 IS
digital camera (equipment in excellent condition) |
Distance to bird(s): |
ca. 8-10 meters |
Duration of observation: |
~45 min. |
Habitat: |
Open, freshwater and saline
marshes with small, isolated chenier ridges of hackberry-elderberry-baccharis scrub. |
Behavior of bird: |
Actively foraging, running
on ground in pursuit of Arthropods (no fruit consumed during encounter). Perching up on human-built structures, i.e.
wooden railings, gazebo, paved parking lot and walkway. Observed at rest and in flight. |
Description: |
A relatively small,
heavily-marked and distinctive thrasher.
Generally gray-brown on upperparts with subtle dark streaking on
mantle. Pale, heavily streaked
underparts with buffy wash on breast and flanks. Cleaner white vent and undertail
coverts. Thin, white tips to median
and greater upperwing coverts imparting distinct wingbars. Dark malar stripe and finer dark streaking
on throat. Brownish auriculars. Long, grayish tail with white corners. Relatively small, straight bill entirely
dark except for pale buff base to lower mandible. Pale light amber irides. Dull gray legs and feet. |
Voice: |
Silent. |
Similar species: |
No
other similar species. Northern
Mockingbird (Mimus polyglottos)
superficially similar in structure/behavior but larger and unmarked below (juveniles marked below but not present in fall). |
Photographs or tape recordings
obtained? |
Digiscoped photos obtained by Devin Bosler. Yes, photos attached. |
Previous experience with
this species: |
Prior experience with
individuals on breeding grounds in ID, MT, and n. NM. |
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 |
Date and time: |
2 November 2010
Time: 8:30 PM CDT |