Vol. 20, No. )1 
Page 3 
chicken population disproportionate to th* , 
noted some tendency of the Bogota flock to s ^ctuary acreage, we have 
past 5 years. 9 ,0Ck to d| sperse to other units over the 
Yeatter-pfe I'd-McGraw 3 unft ^ had^o'bocm^ ^ SeCt, ‘° n ad Jacent to the 
(60 acres) was acquired in 1964. S i nee" ^9 73°°"^ lAn" ^ f ' rSt parCel 
umt comprised 16 percent of the sanctuary acr^l 6 °" acre Donne 1 1 ey -Wa 1 ters 
percent of the cock population and 21 to 96 and supported 19 to 32 
population. Thus, the Yeatter-Fie 1 d m r ^ pe ^ cent of the observed hen 
M :: r n Frczrx-is 
the observed hen population during the treed i ^“seaMs 'o^the 0 p^tT “a'rs 
# r j y“arS1 
achieved 'wi th^cont i'nued ^ ^ «" »e 
units. However, numerous factors may preclud 3 ° n the per 'P heral sanctuary 
population dispersed strictly in proportion to ^ att ?' nment of a breeding 
sanctuaries. Factors currently Hmitina th* a y ai,ab,e acreage of 
an^d t0 P r alrie Sickens include (1) proximitv to^'^? 65 ! ° f the perl P hef *al 
and domestic pets (Otis-Fuson unit ( 2 1 V 1 WOod,and > human activity, 
units (j. McCormack unit), ( 3 ) free-rinnin d ^ 6 " d d,stance from other 
mature woody fencerows (C„ McCormick unit ) 9 (ZVrn^ hemmln 9' ln effect of 
(Galbreath unit), and ( 5 ) disturbance bv hL* 9h topo 9 ra P h Y and brush 
Perhaps insufficient size (Mark unit, 57 acres)’ ^ pheasants » and 
conti^rto^imit'the 6 extent ? to^whtch^e b" ^ B ° 9 ° ta f '° Ck that wi 1 1 
outside of the central units. Recent studies 19 P ° pU,atlon wM1 establish 
hens monitored by radiotelemetry have shown thatV StateS ’ ° f nestfn 9 
distant booming grounds than to tho \ ' • that hens commonly nest closer to 
Also, distances 9 f 1-2 mMes betwe en KT** °" Which " he * 
T us, the peripheral units may be more imnn^T^^ 8nd nests are not uncommon 
Bogota flock than the nuebers of cock. ? l ° the of the 
central units appear to indicate. ~ ° n boom,n 9 grounds in the 
