'./ill iwJ, -A‘ 1 it© iifit.kJ violently from the attacker bo as to hide its fone# 
in tl:.4.3 position it will stay for a few seconds or longer am! this pasture 
se ^ 3 ® to fiwap the attack, But as soon as the chick turns back It gets another 
p©olt and its heed $&vk& rat&id again, ihia xu often repeated several thi©s* 
' tHf.qwatlj th* parent ©tart* to feed the larger young «fcix» the «E..aUer 
or© has itii head turned away. ^e sseollor ©hiak eataltee the -.went 5 a beak 
paraSUUy from the ooxtmr at Its eye and ae aeon aa the food *: )omu up it* 
into too parent’s 2fou.tii s bat- as a rule the larner oixiok a?ta 
*’■’ oi *' ! ■*© uS®* ■ Ip pro^ureE ,„.> foo • it the 
; p - 
«. diaw ^ as ^attl.3* m tissue of food, sfcser cage; the older oftick would oertaiatly 
p v ^ll aOoa a**-* t-so assailer ots would perLsr. This la more advan ta&NiMi 
far the sirviva& of tie apeoiea tha© halfhearted fee. lag of bota chiokal a 
f **' v f cibmnmtUxm indicate that m am oigjbt expeot , the 1 nrger chick 
.£ 
»• 
a.-.t-Apk; vji.- youngest . >. could net decide hew «*Mb food ahsrtagB food 
fighting m» responsible and a careful study of this point alone would he 
A, 
// 
$ 
V 
■■ tm tix? o 
.=.j.:icorfl tes faoa* This inliiMtioa of eggresaisexitse is orobablv reinforced 
°y a JJffljjfll structure, the alaoK mck b&id. Of all the Juvenile gulls/' 
>vay free 
ifc.j op “isieat thereby presents its is^HMad ail displays it furltisr by 
erect >h : i the neo* feather e 9 (l Ig. 10) • The c^i^ariaoi* with other gulls alioc® 
- . . . 
fieplrye! as If it were intended to inhibit attack and 1 Mw' direct eviaeno© 
Pros, 
■ 
-•I « 
-SfS a a-h. U .jBfe -- «k ^ra a, „ -* kW f*.: ^ la. ... ^ 
*W # 
MtW 
^ „ W MLM —q. a 
. r . deoisicn ia af.jgro8siva enoeoiiters betneea hrood asates* -'re o«a mil 
V V&- " J^a<5ia» tdi/it, a iprolon.-^ fi#5t on aaoh a e-nall ledge Biiglit be u.iy,A«;rous for 
al? oewteateata. in addittoe mat hirc& vh*m defeated om still r« 
Zo ■'« aa altC'-ruativu ¥ddoh is lenied to the tmnr 
:u-e ^ ^ 
a ^ts peaked by an adult it tiros its head mm tran the a&taoker 
a. w ^ w ^ w.iw ek -*^*r <****;*. 
$ . ; 
J. .' *& — P. .. ^ . . '**■ 
t < h « i - 
at* .i.Ct 
iliOH 
/AJ- f or :jL g ; to Kit of tier blaak hand asighfc be the need for &u i&aibitor of 
■ ^ ^ Att»3/»a of utraij^p adwlts# But the parent* guard tl«e meat and. youag so 
vua'.. injucaa»ti i-a befevaeii young oe* their nests ana af.raii.je aiiCLts me far 
rwo^r than *ood ■-■csiteece between hraod « late* a. iheiwwf^Bsre i «iu now Inolinad 
to m-Xinvo that the blank band, has developed, in ooaaotidn with intm^brood 
•iOAOCi 
