4, 
3 r )i 
of these ad rin ti - t 
*1 a to itu ;= :~oif life, Jjhw 
v doee not b< si llstoi '/r ~ - r 
' -jJr ■ 
as SW.Q Ki t iiwa <e , Prfr instance it c * j» Pan ilsxlW?3 an./ specialised 
•?. 
cst lifting >&avlour to Improve the jjara ting platforms jrtld in 
o ; ane o t iotT sri t ‘. this N.P . Ashtirle lc i o h>. u? .-; fourth a lot of 
-T- -y •. : 
■ :?. i*> : . 
sight t-'r.oro ; red to b* little rest 
, -* • 
between th-j dia irj,: sn-i vestures of th : r; l-'o v Noddy and these 
• : > _ . 
Sterna soecie-i with which X w s f-cilior, Une of the c.ort similar 
aft* WlHtM.MBt' «•' .«.'-4 
i* . ^ — ** . P ... , • * • y 
• - - 
vas th-. lc . u~ . ... 1. 5 1 8 
•• 1 ■ < - . u . • •* fi * a r* * i,_ ► - ,/i r • l . *r -i 
— - - m 
behaviour ic very stable throughout tv- Laridos. 
• anr ilised posture la its form* is 
identical in other Larida, though it Is a .sue a a ore regular 
Arctic 
I f* ry 
. Wh * 
In t e Black Nod 1y *•• .-behaviour than in the xttosx t. ik’s. 
- . . 4 • > - 
ixknsx The existence of s complex eerlcl courtahlo ft l a day 
8\m.<?e*ta that it is bo -o logout* with the cerirl courtship (high 
■ 
flight) of ether terns . n:t elver com;- -nr ison eonflt*‘T.3 that there 
are general features in c .u- or. in a lto of * fifferon.ee in detail. 
The erect one cure, which f o ' ‘ " Uentioal 
form in nil the kao'-m terns. ! s unexpectedly hissing In the Black 
SOfiln • .5 S' :; 
Noddy - t least I can set recognise r.ny dig homologous 
-j «.•*■. 
Unless it hf.s -Irs stically changed its fur: o + -i on nl form. 
The hostile e ir.i thfc be an ag.groSi.-iv a u, -right such i ; s 
r*~ v 
. 5 ’ - 4 . 
the g ullf hr vo with the opening of the bil super! ’loosed on it 
, 
tc in creese the threatening effect. It occurs in .V-J3 1 the situat- 
ions’ when fulls adopt the aggresniv© u. right. 
' V i- 
'. V - 
; 1 -b pi : h._ fcj '‘8r • 
The ocHturc f r *n> wbirm the crop'- 1 b uttered rc a:, .bios 
* 
" ' 
