286
According to photo-interpretation, 718 Slender-billed Gulls were identified as
laying and subsequently producing 47 clutches, which compares with an estimate of
757 laying birds from a preliminary visual count.
Fig. 5 The location of the different features visually identified and geolocated on the orthomosaics of UAV flights #2 and #3 from 18th May and 17th June 2015
Table 2 Number of
individuals identified by
photointerpretation on the
orthomosaic of UAV flight #2
on 18th May 2015
Species
Attitude
Number
Slender-billed Gull
Laying
718
Standing
144
Clutches
47
Swimming
6
Black-headed Gull
Laying
74
Swimming
39
Standing
33
Flying
3
Other species
All attitudes
27
Total
1091
R. Díaz-Delgado et al.
According to photo-interpretation, 718 Slender-billed Gulls were identified as
laying and subsequently producing 47 clutches, which compares with an estimate of
757 laying birds from a preliminary visual count.
Fig. 5 The location of the different features visually identified and geolocated on the orthomosaics of UAV flights #2 and #3 from 18th May and 17th June 2015
Table 2 Number of
individuals identified by
photointerpretation on the
orthomosaic of UAV flight #2
on 18th May 2015
Species
Attitude
Number
Slender-billed Gull
Laying
718
Standing
144
Clutches
47
Swimming
6
Black-headed Gull
Laying
74
Swimming
39
Standing
33
Flying
3
Other species
All attitudes
27
Total
1091
R. Díaz-Delgado et al.