English and Scientific names: |
Brown-crested Flycatcher (Myiarchus
tyrannulus) |
Number of individuals: |
1 adult |
Locality: LOUISIANA: |
Plaquemines |
Specific Locality: |
woodlot off Diamond River Rd., between ball fields and
Fosters Rd., Diamond |
Date(s) when observed: |
19 February 2009 |
Time(s) of day when
observed: |
12:30-1:30 PM
CST |
Reporting observer and address: |
Justin Bosler Baton Rouge, LA
|
Other observers accompanying reporter who also
identified the bird(s): |
Devin Bosler |
Other observers accompanying reporter who also identified the
bird(s): |
David Muth, Phillip
Wallace, Robert Purrington, and Edward Raynor |
Light conditions: |
Fair skies w/ sun
nearly directly overhead. Plenty of
sunlight penetrating partially leafed canopy for thorough study of subject in
good light. |
Optical equipment: |
Zeiss Victory FL
8x42 binocular (good condition) and Kowa Prominar TSN-4 77mm spotting scope
w/ 20-60x zoom eyepiece (good condition) |
Distance to
bird(s): |
as close as 15
meters |
Duration of
observation: |
on and off for about
an hour |
Habitat: |
Scrubby, second-growth tallow-mulberry-oak woodlot
along Mississippi River w/ understory dominated by elderberry, baccharis, and
dewberry tangles. |
Behavior of bird: |
It appeared, at least slightly, agitated in response to
playback of BCFL; approaching some, but not too close, and responding w/ parts
of song and typical “whip” calls. It
continued to fly-catch from low to mid-canopy usually from the outer branches
at small openings. Also preened from
mostly concealed perch for several minutes. |
Description: |
Large
Myiarchus flycatcher w/ bushy brown crest, mostly gray-brown
upperparts w/ two grayish-white wingbars, and pale gray throat and breast
contrasting considerably w/ relatively bright yellow belly. Yellow extended anteriorly to about
mid-breast or about even w/ upper wingbar.
Thin whitish margins on dark brown inner secondaries. Tail was dark brown dorsally, but showed a
significant amount of rufous ventrally.
R6 had a dark shaft stripe on the inner web w/ the remainder of the
inner web rufous. The tips of R6 were
primarily rufous w/ dark brown restricted to the outer 1/3. Large bill appeared entirely blackish
(perhaps slightly paler at extreme base of lower mandible). |
Voice: |
Repeated emphatic “whip” notes mixed w/ some sputtering
“burrrk” notes (similar to Great Crested but descending) and vibrato
whistles. |
Similar
species: |
Firstly, Dusky-capped was eliminated by the overall
large size and massive bill.
Ash-throated was eliminated by the “chunkier” body, slightly darker
gray and markedly darker yellow tones of underparts, extensive rufous on tips
of inner webs of R6 pair, and oversized bill. Great Crested was eliminated by strikingly paler gray tones of
throat and upper breast, noticeably paler yellow of belly, thin, whitish margins on dark brown
secondaries, dark brown shaft stripe on inner web of R6, and blackish base of
lower mandible; all over and above the rare event of that species wintering
north of extreme S FL/Mexico. |
Photographs
or tape recordings obtained? |
Digiscoped photos
obtained by Justin Bosler and attached. |
Previous
experience with this species? |
Previous experience
limited to a few occasions in se. AZ pertaining to ssp. magister and
in the Lower Rio Grande Valley of TX pertaining to ssp. cooperi. |
Identification aids: at
time of observation: |
none |
after observation: |
Complete Birds of North America (Alderfer, 2006) |
Notes made from? |
notes made after the
observation, memory, and photographs. |
Are
you positive of your identification? If not, explain: |
Yes, 100% positive. |
Reporter: |
Justin Bosler |
Date and time: |
7 March 2009 7:30 PM CST |