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

(last update: June 26, 2012)

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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 adult January
lbbg adult February
lbbg adult March
lbbg adult April
lbbg adult May
lbbg adult June
lbbg adult July
lbbg adult August
lbbg adult September
lbbg adult October
lbbg adult 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.