i6 



THE SEMI-ANNUAL. 



DIMENSIONS AND WEIGHT OF NEST. 





DIAM 



• 



DEPTH 









Outside. 



Inside. 



Outside. 



Inside. 



"Weight. 



Pittsburgh, Pa. 













Wauwatosa, Wis. 





4.00 





2.50 





Grinnell, Iowa. 



5.00 

 to 



2-75 

 to 



3.00 

 to 



I.2S 



to 







9.00 



3-. -JO 



3-5° 



2.00 





Berwjn, Pa. 



5.00 



to 



6.00 



2-75 ■ 

 to 



3- 50 



2.50 



to 

 3.00 



1.50 



to 



1.25 



•75 

 to 



2.00 OZ 



Nests are very variable in extei-nal measurements according to 

 situation, sometimes sprav^'ling, sometimes compact. 







DATE C 



)F NESTING. 



ARRIVAL. 





First. 



Last. 



Average. Time Building. 



First. Common 



Berwyn, Pa. 



5-25 



6-18 



63 



5-9 



Columbia, Pa. 



5-14 





2-25 





Perrineville, N. J ."Nesting begins last of Maj"4-5 days 5-1 



Pittsburgh, Pa. 4-25 6-15 5-10 



Wauwatosa, Wis. ^^ July 



Grinnell, Iowa. 5-10 6-20 5-20 6 to 8 days 4-12 



4-28 



In six years' work Mr. Burns says that the earliest date of nest- 

 ing was May 13, latest June 36, average June 10. 



EGGS IN SET. 

 Largest. Smallest. Av. 



Berwyn, Pa. 



4 



3 



4 



Pittsburgh, Pa. 



4 



3 



4 



Perrineville, N. J. 



5 



,3 



4 



Wauwatosa, Wis. 



6 



3 ' 



4 



Grinnell, Iowa. 



5 



3 



4 



MEASUREMENTS 



• 



Largest. 



Smallest. 



Average. 



I.IOX.80 



1.OSX.75 



I.06X.79 

 I.IOX.98 

 I.07X.81 



I.13X.81 



.96X.75 



I.04X.7S 



1.08X.84 



I.02X.74 



I.05X.S0 



