LOUISIANA BIRD RECORDS COMMITTEE

REPORT FORM

     

1. English and Scientific names: Lesser Nighthawk (Chordeiles acutipennis texensis)

 

2. Number of individuals, sexes, ages, general plumage (e.g., 2 in alternate plumage):

One, presumed second-year (SY) male

 

3. Locality: LOUISIANA: (parish) Cameron Parish

 

Specific Locality: Willow Island off LeBleu Camp Rd. (PR-3183), ca. 5 mi. E of Cameron

 

4. Date(s) when observed: 20 April 2011

5. Time(s) of day when observed: ~2:35 3:45 PM CDT

 

6. Reporting observer and address: Devin Bosler

Houma, LA

7. Other observers accompanying reporter who also identified the bird(s): Justin Bosler

8. Other observers who independently identified the bird(s): none

9. Light conditions (position of bird in relation to shade and to direction and amount of light)

 

Clear sky with optimal afternoon sunlight. Sun angle high and behind observers. Backlighting or glare not a factor.

 

10. Optical equipment (type, power, condition): Zeiss Victory FL 8x42, Kowa TSN 881 Angled 88mm scope w/ 20-60x optical zoom , Canon Powershot SD1100 IS (all equipment in excellent condition).

 

 

11. Distance to bird(s): ca. 10-15 meters

 

12. Duration of observation: ~70+ min.

13. Habitat: Heavily disturbed, fragmented coastal chenier forest. Mature live oak woodlot with herbaceous and grassy understory. Surrounded by unimproved cattle pasture, hackberry-tallow-acacia scrub, short-grass lawn, rural residential, etc.

 

14. Behavior of bird / circumstances of observation (flying, feeding, resting; include and stress habits used in identification; relate events surrounding observation):

 

Observed at rest and in flight. Day-roosting in canopy of mature live oak. Flushed at least twice during encounter. Silent.

 

15. Description (include only what was actually seen, not what "should" have been seen; include if possible: total length/relative size compared to other familiar species, body bulk, shape, proportions, bill, eye, leg, and plumage characteristics. Stress features that separate it from similar species):

 

Overall soft gray-brown nighthawk. Mottled brown, gray, buffy, and white on upperparts. Darkest brown on crown, mantle, and bend of wing. Prominent pale spotting on upperwing coverts. Paler, finely-barred underparts with light gray wash on breast. Uniform dark brown primaries and secondaries with buffy spotting basally. Upperwing coverts and tertials noticeably paler gray than rest of upperparts. White primary patch located close to wing tip. Proportionately short, rounded wing tips. Apparently worn flight feathers (remiges and rectrices) and paler tertials suggestive of one-year-old (or second-year, SY) individual. Whitish throat indicative of male.

 

 

16. Voice: Silent.

17. Similar species (include how they were eliminated by your observation):

 

Common Nighthawk (Chordeiles minor) eliminated by presence of buffy spotting on primaries and secondaries and position of white primary patch on wing (closer proximity to wing tip). Also, proportionately shorter, more rounded wing tips than typical for Common. Pale spotting on upperwing coverts more characteristic of Lesser.

 

18. Photographs or tape recordings obtained? (by whom? attached?): Digiscoped photos by Devin Bosler. Yes, attached.

19. Previous experience with this species: Very familiar with this species from AZ, NM, and TX. Plus, one prior individual in LA. One male at First Bayou, N of Holly Beach (Cameron Parish) on 22 Nov 2007.

 

20. Identification aids: (list books, illustrations, other birders, etc. used in identification):

a. at time of observation: none

b. after observation: National Geographic Complete Birds of N.A. (Alderfer et al. 2005).

 

21. This description is written from: __Yes___ notes made during the observation (_____notes attached?);__Yes___notes made after the observation (date:_____); __Yes___memory.

22. Are you positive of your identification if not, explain: Yes, very confident.

23. Signature of reporter: Devin Bosler Date: 22 July 2011 Time: 1:30 PM CDT

24. May the LBRC have permission to display this report or
portions of this report on its webite? Yes

If yes, may we include your name with the report? Yes