Table 9: Primary Moult in First-summer Atlantic Yellow-legged Gulls at Particular Locations

Location

Dates visited

1st-summer Wing Moult as growing/missing

Notes

 

 

Max-imum

Min-imum

most freq-uent

 

Santander

1 - 9 Aug

none

P8/P9

P9/P10

A minority had completed moult

Porto/ Minho

29 Mar -4 Apr

-/P1

none

none

From 2-5% had started moult

Lisbon

13 - 16 May

-/P4

none

none

10% most advanced state, 20% P1/P2, 30% -/P1, 40% none.

Setubal

27 - 29 Mar

none

none

none

None had started moult

Faro

25 - 31 Mar

-/P1

none

none

20% had started moult

Cádiz

13 Aug

none

P9/P10

none, P9/P10

Equal frequency for the two 'most frequent' patterns

Nerja

26 - 31 May

P2/P3

P1/P2

P2/P3

65% P2/P3, 35% P1/P2

Estepona

17 Aug

none

P9/P10

none; P9/P10

Equal frequency for the two 'most frequent' patterns

Gibraltar/La Linea

22 Aug

none

P9/P10

None; P9/P10

Equal frequency for the two 'most frequent' patterns

Tanger

20 Aug

none

P9/-

P9/-; P9/P10; none

Equal frequency for the three 'most frequent' patterns

27 Aug - 2 Sep

none

none

none

Apparently moult completed

Madeira

25-31 Mar

P1/P2

none

none

78% no moult, 13% P1, 9% P1/P2.

Agadir/ Essaouira

12 - 18 Apr

none

none

none

No moult apparently

23 - 30 Apr

P3/P4

none

none

50% no moult, c12% for each of the four states to P3/P4

Fuerte-ventura

7 - 14 Apr

P1/P2

none

none

Only minority in moult

29 Sept

none

none

none

All had completed moult

Gran Canaria

14 - 20 May

P6/P7

none

P6/P7

27% at most advanced state, 20% to start moult; 13% for P3/P4, P2/P3, P1/P2; 7% for P5/P6, -/P1

23 - 30 Sept

none

none

none

All had completed moult

Tenerife

28 Jul - 10 Aug

none

P8/P9

none

In late July, significant numbers (but under half) still moulting; very few are still in moult by mid-August

4 - 18 Aug

none

none

none

La Palma/El Hierro

5 - 9 Aug

none

P8/P9

none

One bird still in moult

Azores

11 Jun

P3/P4

From one photo

From an analysis of close-up photographs and from field study by the author as in Table 5. Data from Azores comes from Bakker (2000).

Blue font indicates updates since the paper published on 19 October 2001

Home Page Yellow-legged Gulls

Copyright © Nick Rossiter 1999-2002. All rights reserved.