/ 
'> L f, 
FIFTH WEEK. March 31 through April 6. 
Rather a good week. Most of the pairs sl*ow a tendency to 
abandon the mainland. 
References. 
Mutual display . Orientation of the F. Variable, every type 
seems common. Male doing F away from female, before she lands 
(M. Mar 31, 4; M. April 1, 2; M. April 3, 5). Male actually 
re-orienting F away from female, before she lands (M. April 3, 2). 
Female does F away from ma^e when he lands (M. April 5, 11). 
Male doing F pointed at female before she lands (M. April 3, 2). 
The females usually come out of F later than the male; but 
there are some exceptions (M. April 1, 11). 
The female jerking head away from male as she circles him in 
F'(M. April 3, 11). 
Male doing F with tail above wings (M, April 4, 4). 
We have innumerable examples of gulls showing nape in E as 
mate lands; for instance (M. April 3, 4-6-7-10-11; M. April 4, 
3-6; M. April 5 , 1-2-11), 
Repeated "flagging" by female (M. April 1, 8). 
Cpr commonest under wing (M. April 1, 2). Male in Cpr relaxes 
the minute the female flies away (M. April 5, 7). 
Male preening female? (M. April 1, 7). 
Females usually relax immediately when males fly off 
U pward , It is certain that, this usually precedes, and alternates 
with the F when the birds are on the water (M. April 6, 6-7). 
Forward . Done by a single bird, on alighting (M. april 5,4). 
Toward mate during a boundary dispute (M. April 4, 5). 
Erect . Other gulls (not in threat posture?) retreat before a 
bird in El (M. Mar 31, 3; M. April 6, 5; ) Bird in E retreats before 
a bird in F (M. April 4, 7). Bird in E retreats before a bird in 
Choke (M. April 5, 6). 
Tail above wings (M. April 1, 4). 
If any part of the Mutual Display is performed at all, it is 
the E (M. April 4, 6). 
