6 
* 
Moynlhan in other Larida, wiier ? it la i'i.1 1> " co ,r on in agorN&tic 
31 tua lions especially, ac -or'ling to Goethe, whrn the oerf or or is 
rather frightened . Though at first I overlooked this uovo mt 
it Is ter ho coo clear that it wan one of the 0012 son/eat actions 
whenever two Noddies landed near each ot ;er. whether nates or 
rivals or oiub-matee (see b ©low). 
L 
Another common gesture between t;s te - and rivals is what I 
hr-ve cal ' ed Nodding:, I have no way of 'mowin';: whether it is this 
action whi as as- tclidus* bit 
. •» . ■>•**>. •amurA* t 
. S' . •=. . » 
the word exactly describes what the bin 0 do. 1*1 th neck stretched 
; wi M 
obliquely forwards £nd the bil . about horlsonta ‘JL th« j bil l is 
with beak refining closed 
nodded through an grille of ~o degrees or less/ (Fig. 6b) , Ihnxxxiix 
and quickly return©! t 1 the atf- rting .orition, where it is held 
mosien t-s rily before another nod* ^he I f nodding varies but 
■T-i*. 
- J» J. 
at its highest intensity is about 3 Uses a second and lasts for 
two or thre'> seconds. 
„ > > I 
Af ter no' icing th . regularity of Hesc -shaking when a r 
of Brown Noddies come together (see below), 1 found x had overlook. 
this novenent, which occurs in encounters be tweon Blaok do- 1 'ie^ 
1 - • ' ' 
oil iced with nod ling . nd font-locks, though it 1 • -ea red to rno to be 
3 
less regular thon In the Brown Neddy. 
To give s better idea of the frequency of the different 
J 
th o 
displays inidifferent situations I noted the actions Been in a 
sample of encounters when two birds cane together on a -edge. 
These encounters we re claseifie so Hostile, uU €wi one bird drove 
the other sway , and Greeting, when tne t > j birds relaxed >r went 
