Vol. 22, No. 4 
Page 2 
nests than expected on the hscic ~ f . 
fewer. This apparent preference for laraerT 56 "* ^ smal,er fees significantlv 
selection on which we p'revious^y reported *re. spec^el ^ 
may have different size distributions i.ih» Rb 2Z ty :2 )’ since different species 
separately, however, the only difference f " S ‘^ S C ass ? s we re analyzed 
smaller black oaks were selected more often°and l' prev ' ous, V reported as that 
than expected, and shagbark hickories 12 fn h d ar9 ® r black oaks le ss often 
about as often as expected. ' Ck ° r ' es 12 lncha = end larger dbh were selected 
Proportion bui k'"in'’ vi ne^^r' ^^th^ f ^ " ests counted was the high 
Virginia Creeper, and less than',-/ 6 " ests ' 96% were grape, £ in 
counted had vU, it i?'• , Si "« °n'v >« of a, i'trees 
with vines ,n which to build their nests A?tf, rre |l 5 V suan V selected trees 
tant, tree species that most frequently have 9 Vlnes are ob ''i°tisly impor- 
often used for nest building. For example a h h Were n0t nece ssarily most 
walnut, sycamore, and black oak had Wnes than 9 pr ° POrtion of blacl < 
received only average use as leaf nest trees uh-t t 5pecies ' V et they 
significantly fewer vines than other L. Whlte ° ak and beech had 
nests. Other factors such as b T n ^ s^turH 'T S1 > if Gently more 
— of beech apparently pro^'I^b^ “st. 
^S£Onse£ £f P£aj_r|e Chickens _to Habrtat^ Manipulation 
--— K* L. Westemeier, 
p . . D. R. Vance 
Hoyleton have been censusld^the^pr fnq°fo' ^ 7 PK * nmund y> Mt. Erie, and 
boom ^ > res P ect 1 vely. Census was taken in 1 Q 7 Q * ,7 > and H consecutive 
boom.ng-ground surveys and supp 1 ementarv oh^ 9 ' 3S ' n PaSt y6ars ' thr ough 
b.-nds almost daiiy at Bogota ?rom 2kZrt K WSlt ° rS 
cocks censused on'the s 7 eL " 2 , cocks ' down l0 % from the 124 
Prairie chickens in I 11tnois thl. ? • ' the total "“"ber of native 
a 50:50 sex ratio. ’* th ' S Spr,n 9 ma V ba estimated at 224 by assuming 
with sanctuark^for nest !ng' (Bogo^rt V" 9 *" dec ""» the areas 
flock at S R SPr '" 9 ° f 1978 ° n tbe o™anaged'arias n (Mt'T ndy) 7 dropped 
277 hM B °£° ta dro PP e d from 74 cocks ? n 1978 to Aft* Er ,' e and Ho y ,eton )- The 
27% below the long-term mean. The flock at ? Lr 68 * 1979 and remained 
and 22 cocks in I 979 but remained 287 bel nt It ? 3 COntalned 2 > cocks in I 978 
K.nmundy contained 17 cocks in I 978 and ft rnt ] ° ng ~ term mean - The flock at 
term mean * and 18 COcks ln J979, 24% above the long- 
Five males were "counted there'"n^he 6 C °“" ty m3y haVe dIsa PP ea red completely 
W6re ° r he - d d -ing 2 r p r ;:etrn^s 9 f^ Ts’J" 
y ror censusing this spring. Several 
