V*/ 
£ 
4 
f- 
i 'if J 
${\ 
& 
k 
l 
J 
iMind pointing doim as it is ia the obsUw atiereaa the srown-oeetin ? ~i-T, a 
na» to point awaards, if only to see wila t i» £ft on f 
plantation of option attain «j also play f oert taftfttattaTAta.® 
t df : 222 r*; 4 «■ w**-* «*• or «* SSftKS SSTtSft 
<_ ^2J5, ^«^t»Kion “■ alaaa it is used ao muab ia threat display it “ 
„k» pi. immiy a -fcrjre&S struoturs** Also tfer veils® hnai- at im n *J toA * 
flmdlo-. tm I a.a. - _ . , a **" 5 ■ il> “ *•** •**>* It «Kia tfe» MMI 
*' titi „ * *od mammmU serve to attract 
fl /S jL c ;' s?la ^ 00 a shows these structures t/tL birds 
^ hi 2LTT f? it 1 ! *■£*** *»>* •£» 
r?^f a . ; ' ee! i£ “ ■ v. ^ w' a 
JSv P™;®* H bkely feat a growSaStS wl SMlk - 
i al eva A ^ c ‘ a 3 e - aa *•*•* structure <*» Ate face w©uM ahoke for son 
Mavtog diauuaaeci the three aaia questions of oauyation, tmotiitn sod 
^JfT “ *•«*» to ananr theJ ft «St?tTp<»tuw. 
*? “*“* W.ttiw*ta3 and ahottng firot dmm and then 
H -“t «K ntto ia orientated towards tie female Wills aj* tuna 
„p: t, P* **“f J f* “^*t» *«■» that Htttmklag ia an* aggressive 
the sale but her fre.pwrt flights Ao/tS STb 
‘Ti^^wl fea, ,» ia. JMb aonounts for the feet that she warns bar head 
he alsoirts at hare iflr this irovwtent her beak is turned asm 
'lt y v; a tar •*** '■•■- am hum her ,«a;o„ M 
enett-rffte Y- - U . *° <“» 30 •» threat, struotures not only frititon 
,ip ® o 0 - ,ia iV provohe attaak, en>eoiallr in the kp ( y 
.n ation of »tiST^aSte 
difficult to* oTo'urS h e solve d ^dthout TOM tests, a teohnl*. 
«• aley «e Kta.4 «* hao?toS2 ^TtS* 
“** 3004 *« -rtalrt, to haw «, aotiw e£ftt. 
^ la ^ r fe“4Tu to tt ° «“»*“« «S0« «»«• both 
[ ®rlt jaHaed* than in f *** aKih aare si^a aoS 
with the dewteet of * r f ;l*i“ aUoa is ttooi^t to he oonneoted 
apeoies of gals t*rosbt»*i to ^ ^ struotSBPB. Later on ot^er 
- .v, ' - " : :: : ' ;j;,ly’XXs 
tha gnMtSng of bir^tfn? + Z p m@m tjpioal 
utility af^tto JE£^»^a!f ^ tbs 
la stj^i an ap.icaacKrjnt reature ” in £?? blook-4isa(5cd gull just irentianec 
female » brafe T ^ JaUluaka's the turning' my of tbe 
k^ 4- 1 ooaic osri&irij^ »P; ceases the ioals but they hf*ve a ftip^wc* •■-h, im . 1 n i «» > i 
lotii mates p« rfon in ti.n twntin- v;1 ,r . . ^ 7^^; v a I r® ar xa»vet»jnt >viixoh 
J ** »n»tli*g M Usa maoh the a«a© funotior:, tiie ciwliljm 
a 
15 
