8 
only 
heard close at, h*' nd , 
ran to s 
lath xsxas are able 
to bridle arid occasional iy both 
do it togtt r for * short t , frit usually e 
tho other wotch.es. T?nl lb e the other displace described so far, 
■v v .*| ,V , * ^ . S V " . . . . V r 
hridlin.^ often start- without coy obvious external stimulus i e pair 
are standing quietly on a lodge . r as ting or 
■ - rcanin*, when one 
. ©r 3 i y >s . U ?. 
watch. Br id 1 Ing usually dies don to nothing srr fch pair relax 
• « ' • J ' ■■ ' - : . : - : !'■*. - . - • ». .. ■-.* 
■■ ' • -• - • • ' “ - _ r •* : • . ' ' ' y . . • . 1 • . : y - • . - . - -- - ' _ .-. ' v 
h -sin. It other tiaee the bridling is set off toy a particular 
stimulus t for instance the arrival of another bird on a nearby 
i 
'hen a r>air are together the or Idling seeus to have 
*# 
15 ' v •? I‘r e t boyer/’ autir r the note to pay attention, though I 
4 , t _ . . - « ... ; ... - — ^4 - - • f 
have Been that it wy ” the the as to approach close 
v f - •** 
V V 4 
- f t- >>• 
. V * W -- v -- 
lie play 
i 
i np bi rcl . -■ I Ur-rr- 
• r 
■ rn -. 1 i u 1 r. * t to" — ttr — r vr^c f - feet r r r a 
r — vu" - ' iiyn - g . 
Tt — 7"T" ' """h . © to U b-h.-diST? TT mil iHg 
r * 1 deed toentbd of te-Mui 
tt"* » . > 
dhen a single bird is bridling 
this at- i. rooting effect is e one tires clearer, rnd 1 believe it- la 
probably ans of this display tl I ‘ iPPi topy*o*t*P# »vaot 
mates end the t one 
... l ..... , • ;3 *;:> n 
p . . • V V * 
v 1 I * 
«'•- 4 -.f >44* W 
ttract its partner to the 
nest £ 1 i s o f 3. ts c h o 5 c e 
r h i 1 e to r i d 1 i nr 3 a ?•! o d d y e o c t i e e s u 1 1- : r 3 e : *u 1 e t , 
n • How 
"li'rrrrr 
tr 
<0 * * 
» 
r «t f, * n 
A , 
n r v 0 e c < ■ n d c a n <3 f 1 u c t n a tin g i n 1 n t e n a 1 ty 
** 
a o cor ting os the bill, is openefid or closed. Typically, however. 
this cell h« ns to toe uttered froto a soecial Arched d osturo 
vi th 
neck arch©? and looking curiously inflated (did.''}. TUia display 
