92 Trans. Acad. Sci. of St. Louis 
TABLE 15 
A day’s activity of the male Prairie Horned Lark during the incubating 
period (nest No. 21, June 20, 1926, Evanston, Ill.) 
Time of 
Day 
4:20 a.m. Nest reached. se gor -_ in vicinity. 
4:53 ithin 50 feet of n 
4:54 Sotermitrens rheatine peas 
4:59 Intermittent ss song, = — from nest. 
§:25 Greeted fema she le 
5:30 Recitative ground song, 30 fect fro 
5:33 Intermittent aha song — Fee Soy song post, 90 feet from nest. 
5:55 Intermittent ground song and calls, 50 feet from nest. 
6:00 Sitting quietly on mound, 30 ghee from 
6:05 Came within 2 — of t. 
6:14 Intermittent ground song, 30 feet from nest. 
6:15 w from vieeni y. 
6:44 Intermittent ground song, 150 feet theast of nest. 
6:47 Sm ill s rye ng as previously. 
7:03 Singing as previously. delim 
7:12 Tnternittent eee | song, 50 feet due east of nest, h 8 
vegas Intermittent — Sa 2 = feet southeast of nest. — 
7:24 Soft intermittent ground song, 25 feet due east of nest. 
7:25 emained wi 50 feet of at S wrhile formats was away. 
7:33 Intermittent ground song, 150 po oe yer of ai 
8:00 Intermittent ground song, 240 feet south of nes 
8:06 Intermittent ground ren i 60 feet ps anon of soit 
8:09 Soft Parana to — song, 30 feet east of nest. 
8:11 Within 6 feet of n 
8:21 Singing near. 
: a4 Intermittent ground song, 30 feet east of nest. 
8:31 Flew from vicini 
a to During fore ‘to photograph female, male remained near, singing. 
10:03 Flight so 
10:15 Intermittent ground song, 25 feet east of nest. 
10:16 nt ground song south of nest. 
10:40 Intermittent sete song, one ~ a of nest. 
11:39 Intermi tte nt gr song ni 
12:43p.m Flight son, 
1 : an to Intermittent ground song, 150 feet southeast. 
2:00 With female, calling, 30 feet east of nest. 
2:47 und recitative, 150 feet southeast nest. 
3:24 Intermittent ground song, 90 feet south of 
3:30 song, 150 feet southeasl nest. 
3:46 Intermittent ground song, 50 feet 
3:51 Intermittent ground song, 225 feet south of nest. 
4:40 ee ground song, 90 feet south of nest. 
4:53 Intermittent ground song, 300 feet south. 
: = to (Int cho out for observations of other Lark nests.) 
6:39 Flight so: 
7:33 et, 1501 feet ee of nest. 
7:37 vening recita: 
7:40 Sullsinateg sree recitative. 
7:50 Quiet, FS ei ier of nest. sci aaciaeenemmmeensee 
umm. 
Song 
Songrecordsat 25feetfromnest: 3 
Songrecordsat 30feetfromnest: 6 
Songrecordsat 50feetfromnest: 5 
Songrecordsat 60feetfromnest: 1 
rdsat 90feetfromnest: 3 
Songrecordsat150feetfromnest: 8 
Sener —— St 300 feet from next : ; 
ty) eet from nest: 
verage distan 116 feet, or 38.66 yards. 
as f£ ground 28 
oO! ——— 
Periods of aiane cee 5 
Flight songs 3 
Total song periods 36 
