10 POH EB APU DW BYOSNG Be Gaiee hee ee 
The general committee hears reports from chairmen of various water- 
Shed committees. They also discuss the findings of sub-committees; pub- 
licize cases of pollution; and invite sanitary and health officials to discuss 
problems of pollution. Finally they inform the press and continue to work 
for the enforcement of existing sanitary laws. 
Anyone interested in helping in this very important work should contact 
Lewis I. Birdsall, Executive Secretary, 536 North Harlem Avenue, River 
Forest, Illinois, by letter, or phone on Mondays or Thursdays: COlumbus 
1-8400; FOrest 9-9420. 
3720 Lake Shore Drive, Chicago 132, Illinois 
ft ft ft 
Ecology of Land Birds of the Chicago Area — Part III 
By Fuoyp A. SWINK 
THE READER IS REFERRED to the September, 1959, issue of The Audubon 
Bulletin for details on the methods and techniques used in conducting this 
statistical survey of the perching habits of local land birds. This article 
concerns the common sparrows of the region, including the Slate-colored 
Junco, during a five-year survey period of 1955 through 1959. Observations 
consisting of five or less are not itemized. 
SLATE-COLORED JUNCO No. of Per Cent 
Total Observations 833 Perching Site Observations of Total 
No. of Per Cent STASSY_ Wel dae ene ee 6 2.8 
Perching Site Observations of Total smooth ‘sumac 22222 ee 6 258 
hawthorn) “2.2-2--51:.-252-= 94 11.3 FOX SPARROW 
APPl€ — ----------------e2 enero 56 6.7 Total Observations 93 
on lawn. -........-.------------- 43 5.2 hawthorn sess eee 24 25.8 
Towa crab -.........-...-.---- 41 4.9 wild black cherry.....-.- i 7.5 
wild black cherry--...--. 33 4.0 fowa¢rab oe eee 6 6.5 
White ash .........-...-..---- a ye leaf litter among trees... 6 6.5 
Sere: among Paste ae SONG SPARROW 
Reta eiae ee ae 23 2'8 Total Observations 303 
white! onku lee = ae 2s 2.8 hawthorn... 30 9.9 
grassy ground U0) 0) Cpe oe Bele eee 22 9.6 
AMON eat Gees iene 22 2.6 WlOW (SD feet ee 22 (ia) 
hited Cale aoe eee 17 2.0 telephone? wixe™ 2.2.2... 12 4.0 
erassy field .....-...--:.---- 17 2.0 wild black cherry........ 12 4.0 
Glace a eee ees 17 2.0 giant ragweed ......-- eoeedl 8 2.6 
Willow) 8p. (eas ee 17 2.0 broad-leaved cat-tail.... 7 2.3 
highbush cranberry -.--15 1.8 PCAL  -.-.---2---------------------- 7 2.3 
ODNa spat lee ee eee 14 Ws tag alder soceeeeeedec eee eeee ee 7 2.3 
inva: GaTden fencer. ee dt 1.3 bur oak .............-...----.. 6 2.0 
CObLODWOOd see eeee ees 10 1b or fence so tenc tec ence ree ene ences 6 2.0 
giant ragweed -.....-...-.-- 9 ar, Oak SP. ---.--------eeeeeeeeeeneee 6 2.0 
on grassy roadside....-. 9 ial LIN OF (BLOGS qeepeerae ae 6 One 
Oak {spite 2 eee 8 10 WD G5 8 ee rae 6 2.0 
Weed. | DStCh eae sseeea eens 8 1.0 TREE SPARROW 
on ‘eravelfroad). 7 0.8 Total Observations 162 
sugar) maple) cee 7 0.8 hawthorn: <2) or ee oe 24 14.8 
blacks. lOcust sree 6 0.7 ION ORM Oh Rete aera 19 ibs hare 
boxseld erases == eee 6 0.7 yale sp. Tepes ert 5.6 
7] eee 6 0.7 glant ragweed ...........--. Ans 
ed ae eae ee 6 0.7 wild black cherry.....-.- 7 4.3 
FIELD SPARROW WHITE-THROATED SPARROW 
Total Observations 213 gle Total oe 203 
f Wit Orn) gece ee eee ee 13.8 
aires 3 (og eed hee St Oe HO Wem Cl aD eee een 19 9.4 
od ee RS ae = ty, 6.6 leaf litter among trees..14 6.9 
LOW a) Cra i 2 wild black cherry........12 5.9 
Oak SP. ----------0--------+---- 11 Dae Willow spies. eee 12 5.9 
wild black cherry wo--e--- 10 4.7 AmeriGam elm: =. 8 3.9 
blackoak=.2 333-237 8 3.8 Py Cie OT ay) Cumeeee eee eee 8 BG 
DOGGY eee 8 3.8 ee iilGlere 2s ee ie 7 3.4 
AMer1Ga m6) essseee ee 6 2.8 E30 ON pee ies Siete ere seem Be a 6 3.0 
