Birds in our Garden, Cambridge.
APRIL [1917]
1 Robin April 1: [male] [female] [in a flock]; April 2: 2; April 7: 1; April 8: 2 on lawn; April 10: 1 running over snow six in [inches] deep; April 14: 2 [in full song]; April 15: 2 [in full song]; April 21: 2 [in full song] at eve. [evening]; April 22: 4 [male] [female] [in a flock] [in full song] at eve Half-finished, new nest in birch grove.
2 Song Sparrow April 1: 1; April 7: 1 [in full song]; April 8: 1; April 10: 3 [in full song] eating millet in snow cleared spot 
3 [Fox Sparrow] April 1: 2 [in a flock]; April 2: 2 [in a flock]; April 9: 1; April 10: 6 eating millet in spot cleared of snow; April 14: 6; April 15: 1
4 White thr. [White-throated Sparrow] April 1: 1 [in full song]; April 2: 1 [in full song]; April 8: 1 [in weak song]; April 9: 1 ad [adult]; April 10: 1 ad [adult]; April 14: 1 [in weak song]; April 21: 1 [in weak song] (self-same wintering bird); April 22: 1 [in weak song] [self-same wintering bird]; April 23: 1 [in full song] [self-same wintering bird]
5 Crow April 1: 1; April 8: 1 [in flight] ; April 10: 1; April 21: hd. [heard]; April 22: hd. [heard]
6 Grackle April 1: 13 [in a flock]; April 2: 2 sev [several]; April 7: 12+; April 8: 15+ leaf-tossing all day in Jungle.; April 9: 15+; April 10: 7 eating bread snow 6 “[inches] deep; April 14: 2; April 15: 2; April 21: he [heard]; April 22: 4 [in a flock]; April 23: 3
7 Flicker April 1: 1 [in full song]; April 7: 1 [in full song]; April 8: 1 [in full song]; April 9: 1 [in full song]; April 10: 1 [in full song]; April 14: 1 [in full song]; April 15: 1 [in full song]; April 21: 1 [in full song]; April 22: 1 [in full song] (all day long); April 23: 1 [in full song]
8 Hermit T. [Hermit Thrush] April 8: 1 well out on lawn with 2 Robins running very like them. This at 8 A.M.
9 Horned Lark April 8: 14 [in a flock] C. [Caroline Brewster] flying N. [north] over house & garden 1.30 P.M. just above tops of lindens, piping call
10 House Sparrow April 1; April 2; April 7; April 8; April 9: 50+; April 10: 50+ eating millet; April 15: 2; April 21: 3 or 4 (Pair copulating); April 22: sev. [several]
11 Junco April 10: [male] ad [adult] very black head but otherwise typical. Eating millet.
12 Screech Owl April 14: 1 started in eve. [evening] twilight (7 P.M.) from the rear of garden; flew off up Sparks St.
13 Goldfinch April 15: flight call heard.
14 Bluebird April 15: [male] [in full song] heard faintly afar off to westward. Bird apparently on wing.
15 Downy W. [Downy Woodpecker] April 21: [female] in Almy elms; April 22: hd [heard]
16 Ruby-crown K. [Ruby-crowned Kinglet] April 23: 1 [in full song] in lilacs.
17 Blue Jay April 16: 1 [singing]; April 21: 1 [singing]; April 22: 1 [singing]; April 23: 2 [in a flock] in lilacs