Contributor
Date
Location
- Age
- Not specified
- Sex
- Not specified
Observation details
First seen very briefly by Luis only, at about 200 m distance. We moved into the direction where he had seen it but were unable to relocate it, until about 30 minutes later when I picked up a storm-petrel flying in direct flight low over the water perpendicular from us at considerable distance (500 m) I was able to get several photos but couldn’t see any details in the field. Apparent small size made us consider Least Storm-Petrel but wings seemed too long for that species and photos show shallow tail fork, ruling out that species. Hint of paler sides of rump, bold wing bars, intermediate size, and bounding flight style all suggestive of Chapman’s, but large distance not helpful. Not sure if molt can be assessed accurately from photos that distant, but there seems to be a contrast between darker (fresh?) secondaries and paler (worn?) primaries. Markham’s Storm-Petrel can be ruled out by paler sides to the rump (all dark in MASP) and shallow tail fork. Tristram’s Storm-Petrel can be ruled out by shorter tail, shallower tail fork and smaller size.
Technical information
- Model
- Canon EOS 90D
- Lens
- EF100-400mm f/4.5-5.6L IS II USM +1.4x III
- Focal length
- 560 mm
- Flash
- Flash did not fire
- f-stop
- f/8.0
- Shutter speed
- 1/1000 sec
- Dimensions
- 1934 pixels x 1289 pixels
- Original file size
- 500.79 KB