Lesser Black-backed Gull- Kleine Mantelmeeuw (graellsii & intermedius)
(last update:
lbbg 1cy May
lbbg 1cy June
lbbg 1cy July
lbbg 1cy August
lbbg 1cy September
lbbg 1cy October
lbbg 1cy Nov - Dec
lbbg 2cy August
lbbg 2cy September
lbbg 2cy October
lbbg 2cy Nov - Dec
lbbg 3cy Jan-April
lbbg 3cy May
lbbg 3cy June
lbbg 3cy July
lbbg 3cy August
lbbg 3cy September
lbbg 3cy October
lbbg 3cy Nov - Dec
LBBG 1cy: Data sheets, May 2004, Missouriweg - Maasvlakte, the Netherlands.
We developed data sheet for this survey. Measurements of volume after Harris (1964): V in cm3. V = 0.476*length*width2.
The measurements for the pulli of group I:
- Total leg -/- nail. Using vernier callipers readings to 0.1 mm: from feathering to stretched mid-toe -/- nail.
- Head + bill. Vernier callipers readings to 0.1 mm: bill-tip to back-head bump.
- Weight. Place bird in bag attached to unster. Readings to 1 gram.
- Hand span. Ruler readings to 1 mm, measurements from chick age = day 05.
- Sequence of wing-covert growth. Unfold wing and photograph scapulars, wing-coverts and tertials. Use designed forms to note location of unusual patterned wing-coverts or scapulars.
