n 
shallow and then acre ateopl y, often In a fast (-slide, with 
the oair all the tine hern*.- 1 $ s 5 c'loao together that It is diffieu 
. . i 
During tha recent and descent It era often be seen that 
one of the ,ci r is continually adjusting i r position to keep 
I* the o - f ~ i ■ ' o fan i : a n v.v 
whflih the other initiates. During flights J have followed for 
t vo or tire 
u \ 4 1 ' 
- V/ M- jj| 
it w. a rr’- r t ter'S the ru-o individual which 
■ ' . t > 
t " 3 , & l , . . - ' 
occurs du r in* the elide *>f the eerlel lispUy {high flight} of 
v 
I ■ 1 - a 
overco : .ti-:;‘ t n 3 S tior. in la-- forte of t,h' orre: :r.p,.n : r >1 rd to follow 
its partner 'a novo o lie pui<-*cly erousu, 
explanation 1 
[ > h -> •: n 
.»-? i -i, 1 .* X >•* 
th 
a fie r be thing 
■**•4 ■A* l>-> . 
n ‘-Ji* 
hire’' \ T oc-’y .. f<T 
bird , 
ar I cell 4 t, en 
•;u, -'e 
is uncert in. 
H 4 r? 
X* , ; 
best point, of the 
hakes 
itself, Just a a 
; . $ 6 
srtlclfy 'P ? o i r t 
: ••• 1 'I'” t op if ? - p a- ' ooor * In this 
. "X . 
vn it flies up 
h o t th i o b ! u> > i n g un s o j cu r r ing 
ig GO t 
and fro 
at an abnoracl ly high frequency,! -vstchcd birds flyin 
- ' ; i 
4-oxx g* fjeti o bi r -• $ tot 1 ' 1 !.| o ooQf’ c r - c c nd s strut es,> 1 ‘0 ssoo. / bi 
On the other hand when I watched 14-52 seconds of d- so lay flight 
seen (a 1 »o b hex/es / 
involving two birds at a ti so, +7 Shanes vein, 
no secs * /bird). If it had been feasible to count shakes only 
•-•eri od when the bi Is fi ft i t ' j the dis piny 
