Notes

Guillemots start to return to their Lundy breeding ledges in mid-October. Birds must have already completed the moult of their flight feathers in order to return, and the timing of this moult may place an upper limit on the number of birds seen. Post-breeding moult occurs at sea and is difficult to observe (Hope-Jones & Rees 1985). Stages of their pre-breeding moult can be seen at colonies, and has been studied in detail at the Isle of May (Harris & Wanless 1990).

Head moult scoring
(1)     (2)
0%      W    full winter plumage
1-35%   W/T  winter plumage, some summer plumage feathers on chin or cheeks (blackish specks)
36-64%  T    transitional plumage (exactly half way)
65-99%  T/B  near summer plumage (progressed moult), some white specks on otherwise blackish head
100%    B    full breeding plumage

(1) Harris & Wanless 1990, (2) Camphuysen 2007

Results from Lundy

2014    05/11   15/11   18/11

W	4       4       2
WW/T	3	3	3
W/T	8	9	6
W/TT	1	2	1
T	1	10	9
TT/B	0	1	2
T/B	2	11	15
T/BB	1	2	3
B	0	5	2

N	20	47	43
							
Median  W/T     T       TT/B


23/11   E14G0   E14G1L  E14G2aU E14G2aL Total

W               2       
WW/T                    1       1       
W/T             4       2       2
W/TT    
T       1       15      9       6
TT/B    
T/B             8       6       1
T/BB    
B               3       3       2

N       1       32      21      12
							
Median  T       T       T       T



2010    10/11	

W       0
WW/T    4
W/T     10
W/TT    0
T       2
TT/B    1
T/B     2
T/BB    3
B       0

N       22
							
Median  W/T

2008    29/10/08	

W       0
WW/T    11
W/T     1
W/TT    2
T       1
TT/B    0
T/B     1
T/BB    0
B       0

N       16

Median  WW/T



Internal Links


External Links


(W) Winter


(W/T) Winter/Transitional


(T) Transitional


(T/B) Transitional/Breeding


(B) Breeding