Lesser Black-backed Gull- Kleine Mantelmeeuw (graellsii & intermedius)

(last update: June 26, 2012)

Home

LBBG rings

lbbg 1cy May
lbbg 1cy June
lbbg 1cy July
lbbg 1cy August
lbbg 1cy September
lbbg 1cy October
lbbg 1cy Nov - Dec

lbbg 2cy Jan-Febr
lbbg 2cy Mar-April
lbbg 2cy May
lbbg 2cy June
lbbg 2cy July
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 sub-ad Jan-April
lbbg sub-ad May
lbbg sub-ad June
lbbg sub-ad July
lbbg sub-ad Aug
lbbg sub-ad Sept
lbbg sub-ad Oct
lbbg sub-ad Nov - Dec

lbbg ad January
lbbg adult February
lbbg adult Mar-April
lbbg adult May
lbbg adult June
lbbg adult July
lbbg ad August
lbbg ad September
lbbg ad October
lbbg ad Nov - Dec

sub-adult: August

Regarding moult pace and strategy, sub-adults don't differ much from full adults. Sometimes it's hard to age sub-adults correct, but on average, some or all of the following features can be found in 4cy:

  • relatively pale bare part coloration compared to full adults,
  • black markings on the old rectrices, often isolated limited black spots near the centre,
  • p10 with a small mirror, p9 lacking such a mirror and very small white tips on the top of the outer primaries. By August, these tips are worn away and the primaries are brownish, strongly bleached,
  • the grey centres of the old secondaries show a brown hue and the tips are abraded,
  • tertials, outer greater coverts or outer lesser coverts (in the carpal edge) show old adult-like feathers with a relative strong brown hue, obvious much stronger than expected in full adult coverts.

Used as a single characteristic, the evidence is not very convincing, but individuals that combine these characteristics are probably 4cy or 5cy birds.

sub-adult LBBG: Dutch intergrade
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG 3-4cy YK June 2009 & August 2010, Barneveld, The Netherlands
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG 4cy KUAH August 20 2012, Katwijk, the Netherlands.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG 5cy ACAR August 15 2003, Westkapelle, the Netherlands.
sub-adult LBBG in August, ringed in Belgium. (103044 bytes)LBBG 5cy AMAK August 01 2003, Zeebrugge, Belgium.
sub-adult LBBG in August, ringed in Belgium. (79257 bytes)LBBG 5cy BBAF August 01 2003, Zeebrugge, Belgium. 
sub-adult LBBG in August, ringed in Belgium. (84626 bytes)LBBG 5cy BLAR August 01 2003, Zeebrugge, Belgium.
Lesser Black-backed Gull 4cy & 6cy DWAM August 2009 & April 2011, Calais, NW France. Picture: Jean-Michel Sauvage.
Lesser Black-backed Gull 4CY TGA.D August 09 2014, Boulogne sur mer, NW France. Picture: Jean-Michel Sauvage.
sub-adult LBBG in August, ringed in Belgium. (77562 bytes)LBBG 4cy L-87262, August 01 2003, Zeebrugge, Belgium.
sub-adult LBBG in August, ringed in Belgium. (85229 bytes)LBBG 4cy L-92876, August 01 2003, Zeebrugge, Belgium.
sub-adult LBBG in August, ringed in Belgium. (85229 bytes)LBBG 4cy NLA 5.364.457 August 11 2006, Amsterdam, the Netherlands.

 

sub-adult LBBG: intermedius

1cy argenteus in November, ringed in Belgium. (25637 bytes) LBBG intermediusV6TE July 2012 & August 2014, Utrecht, the Netherlands. Picture: Herman Bouman.
1cy argenteus in November, ringed in Belgium. (25637 bytes)LBBG 4cy H116 August 25 20910, Westkapelle, the Netherlands.

sub-adult LBBG: unringed birds
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 20 2012, Katwijk, the Netherlands.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 20 2012, Katwijk, the Netherlands.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 22 2012, Katwijk, the Netherlands. P7-P10 old.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 22 2012, Katwijk, the Netherlands. P2/P5.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 22 2012, Katwijk, the Netherlands. P3/P5.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 20 2012, Katwijk, the Netherlands. P3/P5.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 20 2012, Katwijk, the Netherlands. P3/P6.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 20 2012, Katwijk, the Netherlands. P2/P4.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 22 2012, Katwijk, the Netherlands. P2/P6.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 20 2012, Katwijk, the Netherlands. P3/P6.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 22 2012, Katwijk, the Netherlands. P4/P7.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 22 2012, Katwijk, the Netherlands. P5/P8.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 20 2012, Katwijk, the Netherlands. P3/P6.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 20 2012, Katwijk, the Netherlands. P3/P6.
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 22 2012, Katwijk, the Netherlands. P4/P7.
arrested moult in sub-adult LBBG
sub-adult LBBG in August, ringed in Belgium. (82012 bytes)LBBG sub-adult August 20 2012, Katwijk, the Netherlands. P1-P2 missing. Moult division at P7. Mirror on P10. Classic pattern for 3cy fuscus. Elongated bird, probably 3cy fuscus.
7848subad.jpg (68382 bytes)Photo 5: LBBG sub-adult, August 15 2003, Westkapelle, the Netherlands.