Birds in our Garden, Cambridge
APRIL. [1918]
1 Robin April 1: 3 [in full song] at eve [evening]; April 2: 1; April 3: 1; April 4: 1; April 6: 3 (2 [in full song]); April 7: [male] [females] [in a flock]; April 8: 3 [in a flock]; April 9: 3; April 10: 2; April 12: 1; April 13: 1; April 14: [male] [female] [in a flock]; April 15: [male] [female]; April 16: [male] [female] [in full song]; April 17: [male] [females] [in a flock]; April 18: 4; April 19: 2; April 20: 1; April 21: 2; April 22: 2; April 23: [male] [female]; April 25: [male] [female]; April 26: [male] [female]; April 27: [male] [females]; April 28: 2; April 30: [male] [female] [in full song]
2 House Sp. [Sparrow] April 1: 6+; April 2: 6+;April 6: 8+; April 8: 10+; April 9: sev. [several]; April 15: sev. [several]; April 16: [several]; April 17: [several]; April 18: sev. [several]; April 19: 6; April 20: 6 April 22: 6; April 23: 6; April 24: sev. [several]; April 25: sev. [several]; April 26: 9; April 27: 12+
3 Br. [Bronzed] Grackle April 1: 7+ mating; April 2: 5; April 4: 5; April 5: 1; April 6: 5; April 8: 8 [in a flock]; April 9: 8; April 10: 2; April 12: 2; April 15: 3 one [male] ad. [adult] badly injured & moping; April 16: 15 [in flight]; April 17: 10; April 18: sev. [several]; April 19: sev. [several]; April 23: 3; April 24: 3; April 25: 9; April 26: 7; April 27: 5; April 28: 5; April 30: 7
4 Flicker April 1: 2 [in full song]; April 8: 1 [in full song]; April 20: [female] on ground; April 28: 1
5 Can. Geese [Canada Geese] April 1: flock heard in distance westward at 4 P.M.
6 Fox Sparrow April 2: 1; April 3: 1; April 4: 1 [in full song]; April 5: 1; April 6: 1
7 Crow April 1: hd [heard] at sunrise; April 2: [heard at sunrise]; April 3: 4 [in a flock] in lindens; April 9: 2; April 16: 2 [in flight]; April 19: 4; April 24: 2; April 25: 2; April 26: 2
8 Blue Jay April 3: 2 in lindens; April 7: 2 [in a flock]; April 8: 1; April 11: 1; April 13: 2; April 15: 2; April 18: 2 ; April 23: 2; April 24: 2; April 25: 2; April 26: [male] [female] at work on [?] nest at arborvitae in Jungle; April 27: [male] [female] & nest; April 28: [male] [female] building another nest; April 30: [male] [female] [building another nest]
9 Sparrow Hawk April 6: [male in full song in flight]; April 7: [male in full song in flight]
10 Junco April 8: 1; April 25: [female]; April 26: [female]
11 Downy W. [Downy Woodpecker] April 15: 1 in Jungle; April 20: hd [heard]; April 22: 1; April 23: 1; April 27: [female]; April 30: hd. [heard]
12 Starling April 16: 2 in Parkman apple tree; April 22: 1 in willow; April 27: 15+ Hubbard Pk [Hubbard Park]
13 Hermit Thrush April 19: 1 in Jungle/ 2 in grounds of H.M. Spelman; April 20: 1; April 22: 2 [in a flock]; April 23: 1; April 25: 2 on ground in garden; April 26: [on ground in garden]; April 27: 2 [on ground in garden; April 28: 1 [on ground in garden]
14 Swamp Sparrow April 23: 2 [in a flock] in thicket by Mus. [Museum] 
15 Sapsucker April 25: [male] ad. [adult] in Jungle. [female] im [immature] (no red) in birch; April 26: [female] ad. [adult] & [female] juv [juvenile] Jungle; April 27: [female] juv. [juvenile] (no red); April 28: [female] ad. [adult] in Jungle; April 30: [female] ad. [adult] [in Jungle]
16 Chippy [Chipping Sparrow] April 28: 1 [in full song] (Hubbard Park) 1 [in full song] Elmwood; April 30: 1 [in full song] Hubbard Park