4 THE (AU D U-BiOwWN BU Leia 
The Seventh Annual Conservation Conference of the Natural Resources 
Council of Illinois, under the chairmanship of Dr. Richard H. Rodrian of 
the Cahokia Nature League, will be held on Sept. 23-24-25 at Camp Saga- 
wau in the Palos Park Forest Preserve, south of Chicago. The theme of 
the meeting is “Conservation — Town and Country Style.” Full reports of 
both meetings will be published in the December issue of the Audubon 
Bulletin. 
i ft fi 
Ecology of Land Birds of the Chicago Area — Part V 
By Fuoyp A. SWINK 
OUR COMMON FLYCATCHERS are the subject of this article. Techniques used 
are the same as those described in the September, 1959, Audubon Bulletin. 
Observations of less than 4 for any given perching site are not itemized. 
Survey period is from 1955 through 1959. 
CRESTED FLYCATCHER bur oak 22 4 2.0 
Total Observations 72 seein field © ~...:<.+-.-:-scage ¥, ot 
awthorn! 222... 5 : 
5 i No. of Per Cent Smooth sumer. ee 4 2.0 
Perching Site Observations of Total 
. PHOEBE 
Whites 0 ale ve sek arneseaeetee 10 13.9 F 
PRP asd ca © a og ct Cee ee ae 9 12.5 Total Observations 124 
NGL LEKOl soe et 7 9.7 No. of Per Cent 
hight One ese nee acre 6 8.3 Perching Site Observations of Total 
OAK SP. -----------2eeeseeeeeeeeeees 6 8.3 hawthorn’ \.212 4... -o eee 14 11.3 
COG OMW.O0 Cleese nexeetanncenses 4 5.6 Willow 8p. use. ee 12 9.7 
wild, black “¢herry..---- 8 6.5 
KINGBIRD apple :2..224:4:-2225eee 8 6.5 
Total Observations 199 Oak SD ieee 6 4.8 
No. of PerCent Sugar maple ......------------- 6 eo 
6 : Wie. white sash 225 ee 6 : 
Perching ane Eg a ey of Tota eT Fee Zz 39 
telephone, wite <2-2--------23 11.5 fallanctree: =... eee 4 3.2 
APPI]C  ------------ee--eeeeeeeneeeeees 17 8.5 slippery ‘elm i 2--.---<. eee 4. 3.2 
[ON CeW ae re ee IN fej 00) 
Will OWaes Dag cetse-seseesaeoe sence ie 8.5 WOOD PEWEE 
COLLONWOOd = 7 --cenensen-nennn 2 4.5 Total Observations 59 
black, (0ake eee 8 4.0 
Oak Capone ves tte aoe 8 AO No. of Per Cent 
Dom eld crue Paes te tee 7 25 Perching Site Observations of Total 
AV Gta O 8 Kame nanes Ree eae 6 eal) White) O08 Kk 02202. eee 10 16.9 
PATA eCW Calin Clinics essen seer 5) P45) bursoaki 22... 9 155) 
dead Fishin pieeese sees ee. 5 2.5 OBK. Spel eee eee 6 1.0.2 
[Ga Riess eee, eee 5 2.5 Tedwiod Kees eee 4 6.8 
Interesting observations can be made by determining the percentage of 
times each of the birds has been seen in oaks (regardless of species). With 
the Phoebe, this figure is 10.5%, with the Kingbird 13.6%, and with the 
Crested Flycatcher 38.9%. However, the total oak percentage with rela- 
tion to the Wood Pewee is a remarkable 59.8%. This helps bear out the 
fact that the Crested Flycatcher and the Wood Pewee are birds of wood- 
land, while the Phoebe and Kingbird are more often in open country. The 
Kingbird is the only one of the four commonly seen on artificial perching 
sites, such localities accounting for 28.1% of the total. It may be noted that 
the Crested Flycatcher prefers a lofty perch in the forest, and that the 
Wood Pewee prefers to perch on dead snags of trees. Following is the 
semi-monthly distribution of the four species: 
