English and Scientific
names: |
Bell’s Vireo |
Number of individuals: |
1 |
Locality: LOUISIANA: |
Cameron Parish |
Specific Locality: |
3.2 km ESE Johnson Bayou school |
Date(s) when observed: |
14 September 2007 |
Time(s) of day when
observed: |
11:00 |
Reporting observer and
address: |
Robert C. Dobbs |
Other observers accompanying reporter who also
identified the bird(s): |
N/A |
Other observers accompanying reporter who
independently identified the bird(s): |
N/A |
Light conditions (position of bird in relation to
shade and to direction and amount of light): |
Mid-day sunlight; bird observed in bright sun and in shade of vegetation where it was foraging |
Optical equipment: |
Swarovski 8x30 binoculars |
Distance to bird(s): |
12 m |
Duration of observation: |
2 min |
Habitat: |
Hackberry-dominated cheniere forest |
Behavior of bird: |
Foraging in vine tangle in subcanopy of hackberry |
Description:
|
Small, olive-yellowish passerine (yellowish primarily on sides, flanks); short, but thick bill; dark iris; indistinct pale area around eye with a faint and indistinct dark eyeline; single thin, white wingbar; relatively long tail (ie given body size/proportions) |
Voice: |
Bird was singing regularly throughout observation. Song, which I immediately recognized as Bell’s Vireo, was a series of 6-7 raspy phrases that seemed to accelerate slightly or increase in emphasis slightly toward end. |
Similar species: |
Distinguished from drab warbler (eg Tennessee) based on bill size/shape. Warbling and Philadelphia vireos have very characteristic and clean facial patterns and relatively short tails. Juvenile White-eyed Vireo may have the best potential for confusion, but in addition to plumage and structural (ie relative tail length) differences, the song is very distinctive (and nothing like White-eyed) and confirmed the identification |
Photographs or tape recordings obtained? |
No |
Previous experience with this species: |
I am very familiar with western Bell’s Vireo, having spent extensive time working and birding in Arizona, and with eastern Bell’s Vireo, where I regularly observed breeding birds as an undergrad in northern Arkansas |
Identification aids: |
Sibley guide, consulted later in day of observation |
This description is
written from: |
Field notes taken at time of observation |
Are you positive of your identification? If not,
explain: |
Yes, positive of ID |
Reporter: |
Robert C. Dobbs
|
Date and time: |
11:45, 19 December 2007 |