1 h 
{'bout the i r Ossa r »r . n recognise m c-l©v:<mta 
of attack and ••«;:*• bit the Aiapligr la fact v«p/ rarely leads 
to either thlU Its rsetn occurrence Is oetr'©.*o 't«atAi I or 
actual jiiiptuors so that I suppose sexual tendency bust be 
1®. ortant even though on* c i entif? I ly tdJHiflL 
demon ts in the Mcve&ents, 
T discus Ida of the motivation >f court Chip sad tnr*»t 
11* J * & the ft . *1 iU ■. vi &t( ar 
tbs sorts of ways they or n soaetiiso# be overcome. A farther 
valuable source of evidence eoiaeo fret? re ■, * t* • *■ pocioe. At the 
moment the befor viour of -'ther o -eel os f t- rso ie tmA A,r 1 rive stirs* 
ion. in Holland, America and else ■■*■ , %.%, r«sul to of 
thw* iludlts I hidlfinliiR t bo ublis *1 and *1 sre being 
mad© on noro sad more *r*ciee # According to my observe Ucnc <h© 
biro’s cup in the Arctic tom so one to be. a tbre .t sine biro, 
Sine# a hired o*' » 1® found very widely e..jonr-: ter.*s ew.s sight 
et .-set that eH ih^se a c , •» A A e ,r threat c.afcur-.* vmioh 
displayed thr re.: towards rival*)# In the • oca, year I b&v e be n 
Inform* fro- • ufc ished rotf? ur\ {.to? Cmylta torn vnd ae yet 
un./dbilahe 1 ©biiervv time on th endriob tern that It eerna that 
both irry have <moh a posture, ify persons! observe tl one, 
ukI , on Bison,, i nd^iaU teree 
are taxono^lcally farther and farther remove T^fv^k the Arm tie 
hr v© shown is e the value of such oenpciritcn*. One can rstarti 
in . sw thee** that th© o i*?rtaniiirf in tha ?ome-« for vatobing 
thou© four h, •seise of terns, to my nothing of lure© a eel s 
of the related gulls, wuot bo unique* 
'Meat building in the Arctic bm i* n:»t a very elaborate 
business# Unlike the gulls there Ir no col It ati .•*• o: Vo^f. Title 
of ;.:«t -rir l fr a dis tire t & , ,o t far il-oa. tl, rite fc, -t-- ttf t th re 
sowmiAlts on the nest r l ell : t i*-c- v f i all atick 
in the, vicinity of the scrape. Each tlK© a tern w&i he y 
f r< 'f*scrap* It usually :1c 3 A osit# 
then to one aide of its body, Each tl~e a rhel .. to c/- rri id 
It. tbTt* a few inches closer towards t c nert so that by tie 
UtN the #*** h* • - |Ult* i) her of object* . .. It# accumulated, 
he ho Mt of the RMl is akd* b; the sere ..4 nit activity like 
that used by the ale * ' =*r r Acting# It that a* a rule 
one of thu acre ©a wb.i the suftlc ®*hv?s in. Uila \y is finally 
u.'cc! by the fesrAc to Icy her e ■ d? in* As ? ocrai i •: bird 
tends to select a aliwhfc hollow to perfors in the birds- with 
t | i.es : ’ | - • c> 1 1 y have their ^ a ' ^ Id r lf- ' J '. '' 
which nre at once flooded. ?-n-A the *w, #& drowned ly a sho o*r of ri' In# 
the cans m of **ra a inveat *t«d on:! I found 
by re '<• in v expo riuon ts with woodsted js that Uu< sera -*.nit which 
fellows the arc* tin* of the cate Ip a different Kind frr- tart 
which one see a the parent doina --f'er the jonn--; ' r - n , toned. 
This letter bind of com pin «t la an cxirc sion of frustrated 
broodincss while during arcetina it 1® fmetrato-i sexual activity. 
( A tendency is said to be> frustrated if it is a reused by the 
o pm ri- te stiwull but for- one r aaon or anoth© oannot ox ress 
