Atlantic Yellow-legged Gull (atlantis)
(last update: October 12, 2011)
Atlantic YLG adult April
data from: Malling Olsen, K. & Larsson, H. 2004 Gulls of Europe, Asia and North America. London: Christopher Helm.
MEASUREMENTS
Lengths in mm; weights in g. Own data based on skins in AMNH, MCZ, NHM, NNH, NRK, USNM, UZM, ZMA. Michahellis Mediterranean and N Black Sea. Atlantis Canary Islands, Madeira, the Azores.
| WING | ||
| L. m. michahellis | ||
| Adult male | 425-472 (449.3) | 36 |
| Adult female | 415-472 (436.0) | 19 |
| First-year male | 415-447 (432.7) | 8 |
| First-year female | 408-450 (429.6) | 8 |
| Note Adults, Camargue, S France, 418-485 (mean male 465, female 440; n=160) (Isenmann 1973); Spanish Mediterranean 411-478 (mean 451, n=107); Spanish Atlantic and Cantabria 337-452 (mean 421, n=57) (A. Bermejo in litt.). | ||
| L. m. atlantis | ||
| Adult male | 426-453 (439.6) | 19 |
| Adult female | 408-445 (421.3) | 17 |
| First-year male | 408-446 (427.7) | 6 |
| First-year female | 391-420 (411.0) | 5 |
.
| BILL | ||
| L. m. michahellis | ||
| Adult male | 51.6-59.9 (54.4) | 36 |
| Adult female | 48.0-55.9 (52.2) | 19 |
| First-year male | 48.8-56.8 (52.7) | 8 |
| First-year female | 43.0-54.5 (49.0) | 9 |
| Note Adults, Camargue, S France, male 56-65 (mean 61, n=80), adult female 50-61 (65) (mean 56, n=80) (Isenmann 1973); Spanish Mediterranean 46-67 (mean 56 n=107), Spanish Atlantic and Cantabria 46-64 (mean 55, n=5 7) (A. Bermejo in litt.). | ||
| L. m. atlantis | ||
| Adult male | 49.6-57.0 (53.4) | 18 |
| Adult female | 45.5-54.1 (49.1) | 17 |
| First-year male | 47.8-56.5 (52.5) | 5 |
| First-year female | 44.5-51.4 (47.6) | 4 |
.
| BILL DEPTH AT GONYS | ||
| L. m. michahellis | ||
| Adult male | 17.0-21.5 (19.5) | 36 |
| Adult female | 16.6-20.9 (18.0) | 19 |
| First-year male | 15.9-18.7 (16.9) | 8 |
| First-year female | 14.5-18.5 (16.8) | 9 |
| L. m. atlantis | ||
| Adult male | 16.7-20.6 (19.1) | 18 |
| Adult female | 16.4-19.1 (17.4) | 16 |
| First-year male | 17.0-20.1 (18.5) | 5 |
| First-year female | 15.6-17.7 (16.8) | 4 |
.
| BILL DEPTH AT BASE OF BILL | ||
| L. m. michahellis | ||
| Adult male | 17.5-22.4 (20.0) | 36 |
| Adult female | 16.7-21.9 (18.5) | 19 |
| First-year male | 17.0-19.0 (18.2) | 8 |
| First-year female | 15.2-18.5 (17.2) | 9 |
| L. m. atlantis | ||
| Adult male | 18.3-21.1 (19.8) | 18 |
| Adult female | 16.0-19.9 (17.8) | 16 |
| First-year male | 16.5-19.6 (18.3) | 5 |
| First-year female | 15.8-18.3 (16.9) | 4 |
.
| GONYS LENGTH | ||
| L. m. michahellis | ||
| Adult male | 13.8-18.9 (16.0) | 36 |
| Adult female | 13.0-17.1 (14.9) | 19 |
| First-year male | 14.0-16.6 (15.4) | 8 |
| First-year female | 11.6-16.1 (14.7) | 8 |
| Note Spanish Mediterranean 16.0-22.6 (mean 19.5, n=107); Spanish Atlantic and Cantabria 11.7-20.7 (mean 18.0, n=57) (A. Bermejo in litt.). | ||
| L. m. atlantis | ||
| Adult male | 14.4-17.8 (16.3) | 18 |
| Adult female | 13.5-16.9 (15.3) | 16 |
| First-year male | 14.2-18.7 (16.4) | 5 |
| First-year female | 14.4-15.9 (15.0) | 4 |
.
| TARSUS | ||
| L. m. michahellis | ||
| Adult male | 60.2-73.8 (67.6) | 36 |
| Adult female | 58.3-72.6 (63.2) | 19 |
| First-year male | 62.5-68.8 (66.4) | 8 |
| First-year female | 59.6-68.9 (65.2) | 9 |
| Note Adults, Camargue, France: male 65-80 (mean 72, n=80), female 60-75 (mean 67, n=80) (Isenmann 1973); Spanish Mediterranean 51.6-79.5 (mean 64.6, n=l07); Spanish Atlantic and Cantabria 55.4-75.0 (mean 64, n=57) (A. Bermejo in litt.). | ||
| L. m. atlantis | ||
| Adult male | 61.3-68.6 (65.5) | 18 |
| Adult female | 56.6-63.9 (61.4) | 17 |
| First-year male | 58.6-68.5 (65.3) | 5 |
| First-year female | 56.6-67.1 (60.3) | 4 |
.
Weight L. m. michahellis S France adult male 1,040-1,500, adult female 800-1,400 (Isenmann 1973); Spanish Mediterranean 550-1,225; Spanish Atlantic and Cantabria 420-1,600 (A. Bermejo in litt.).
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Atlantic YLG (atlantis) adult, April 17 2008, Funchal, Madeira Islands. Picture: Thijs Valkenburg..jpg)
Atlantic YLG (atlantis) adult, April 06 2008, Funchal, Madeira Islands. Picture: Thijs Valkenburg.