* 
3 
either ignored or picked up ard dropped ng .in. The side?/.: ys 
deposltl/ig action so chars . teris tic of other La rid a ms not 
seen by n.e, though subsequently noticed by K.P. Ashrcole. 
The only other neetbuilding moveicent was scraping, v»ry 
similar to that described for the Black-headed (Tull by Moynihan, 
The depression of the tail rrhlle scraping was ^ertlculerly 
^#Ami ttt skJUot^ A tte 
u tfc *** ^ . 
3 trikirig. 
^5 
0 c c u na tl on of led g es, • 
wAw» ■ miw iiu mm .p . w u mwi i h — « ii»~ » **» 
Ledges which are in use as noste are defended by single 
birds or airs against intruders, but in addition other ai tea 
are defended, even tiny kno/b© of rock rh« re 5. * 8 o«? , ik&s 
imnos elble for a Noddy to rear a fstcily , So tie individual 
bird a c out 3 Is recognised by idiosyrehresies of oluuage, and there 
were also a few I had colour- ringed. The behf v5.oi.ir of these birds 
showed that, at the time of year I was watching, the birds, apart 
fpoia those with eggs and young, v/ore /res trictin * their attentions 
yfw m-l m»9€ 
to a single ledge but often vi © i ted/ dA f d » j r» n i n f-6 , aotneti^es 
in different parts of the cliff. Ledge:) war* not visaed at rand on, 
however, since the ear© . two — e-r t . i r ■» - led p-s wouid to viol tod on 
d i f f e r at oc e a j 1 o n a . 
F i ■ a 1 1 a « a n d t h r e s t be h e v i our . 
The Noddies defend their ledges by displays and by actual 
fighling* They attack each other with their berks, wi thou' us wing 
wings or claws. Usuolly an Intruder flees as soon a 3 
a 
no the r threatens or advances towards It, out occasion-- j a pro er 
f i g h t n*v* : e v o 1 o pi 
SouetiTOS a bird who ia attacked (for instance a young 
