off together In a dis play flight (see below) . %e hostile 
encounters were further divided into the performance of the at tack- 
in* and fleeing birds. In the Gre ting the performances of the 
on the ir< ■ e 
two birds were /alike and are not therefore dis tlngusihed. 
(able 4 snows the percentage of porforuaneeo in each class in 
which a dl ? -ley occurred at let. at once. (tending 50000 r.r omi’frtcd 
1 s© they are not part of the Et« r 'd shakes 
* - “ «. ■ : ■ d- * K2 25?*^ J* V ' ' ' ' 
arc omitted because the / wore overlooked until toe late. ) 
1 - ’* ■ c ^ j ^ * 
Attacking Fleeing Greeting 
duelling 
Croak 
Gs ' e (not 1 a nd i nt $ 3 1 
gape) 
0 
to 
Foot-lo ik 
ft '3 ^ 
■ ! kchhh*' 
■ Ldin 
*! 
3 1 
m > * 
0 
■• ■ : •• 
■ = • * 
o 
1 o 
Ho. of per forma 
on which t based 
*■? *— 
/ s 
44 
o o 
4K 
Hcn-hc J til V - 1 1 - • - i- A •- be tW; : uu 
— I. nl^pi. ,111,1,1 Ill II, II II -III II If, nil nr'" "ni“ — . «**«* l >W — *■ *•” lrTT ' w 
Jf; L r . 
Vrf \ i i.r 
.4 l 
uh'.- COO- Oiluo ti 
mu 1 la plays when a pa ir are 
together ie Bridling . One bird, with body tilted slightly forward, 
: • 
( idr:. 7 , : closed 
with an audible click as the head il thrust f o r wo r i a o in to *.■ 
„ I C; if f^£ * *£• ' > . • "O "• - 0 .. 
ositlon shown in Fi .. . 'tteKXMXlBMMX&urtt* mw Bk*MnwUt«XKa«**MgtF 
drawn back, the 
*h 
c? who 
to kv, id -fro oovo :• 
< : s tS tm 
to 
or a 
,',o-d - oond 
. . «*S 
1 1 %■ 
ana 
ho two positions alternate smoothly some tl ics for .ilnuto-. 
with only short lnterruptio-i** 
ihs dis <i.ay is pult* si i ont ex go t 
for the closing of tae beak, which can 
