Birds in our Garden, Cambridge
APRIL [April 1919]
1. Robin April 1: 2; April 3: 3; April 4: 1: April 5: 1; April 6: 1 [in full song]; April 8: 2 [in full song]; April 9: 2; April 10: 1; April 11: [male] [female] [in full song] [in a flock]; April 12: [male in full song] [female]; April 13: [male in full song] [female]; April 14: [males in full song] [female]; April 15: [males in full song] [female]; April 16: 1 [in full song]; April 17: 1 [in full song]; April 18: [males in full song] [female]; April 19: [males in full song] [female]; April 20: [males in full song] [female]; April 21: [males in full song] [female]; April 22: [males in full song] [female] 
2. Fox Sp. [Sparrow] April 1: 4; April 2: 1; April 3: 8: April 4 4 [in full song]: 4; April 5: 4 [in full song]; April 6: 1 [in full song]; April 7: 1 [in full song]
3. Grackle April 1: 6+; April 2: 10; April 3: 12+: April 4: 10+; April 5: sev. [several]; April 6: sev. [several] April 7: sev. [several]; April 8: 12+; April 9: 15+: April 10: 13; April 11: 12; April 12: 12; April 13: 10; April 14: 8; April 15: 8: April 17: 5; April 18: 4; April 19: 6 April 20: 6; April 21: 6; April 22: 6
4. House Sp. [House Sparrow] April 1: 20+; April 2: 20+; April 3: 20: April 5: 15; April 6: 12; April 7: 12; April 8: 12; April 9: 12: April 11: 15; April 12: 20: April 13: 20; April 14: 15; April 15: 15; April 17: 15; April 18: 20: April 19: 12; April 20: 12: April 21: 10
5. Downy W. [Downy Woodpecker] April 1: [female]; April 2: [male and female in a flock]; April 4: [female]: April 7: hd [heard]; April 8: [female]; April 11: hd [heard]; April 12: 1; April 14: 2; April 15: hd [heard]; April 19: 2 [female]; April 20: hd. [heard]; April 21: hd. [heard]: April 22: hd. [heard] 
6. White br. Nuthatch [White-breasted Nuthatch] April 2: 1 in elm; April 4: hd [heard]
7. Crow April 2: 2; April 3: 6 [in flight]; April 4: 4 [in flight]; April 5: sev. [several]; April 8: 4 [in flight]; April 9: sev. [several]; April 10: sev. [several]; April 11: hd [heard]; April 13: hd [heard]; April 14: hd [heard]; April 15: hd [heard]; April 19: 2 [in flight]; April 20: 2 [in flight]; April 22: 2 [in flight]
8. Junco April 3: [male in full song] [female]; April 4: [male in full song] [female]; April 7: [male in full song]; April 8: [female]; April 12: [male in full song] 
9. Hairy W. [Hairy Woodpecker] April 3: small [female]; April 4: very small [female]; April 6: hd [heard]; April 7: hd [heard]; April 8: very small [female]; April 9: [male] [female] both very small; April 12: small [female]; April 14: [male] [female] [in a flock] both small; April 15: [male] [female] [both small]; April 19: big [female]; April 20: hd [heard]; April 21: hd. [heard]
10. Chickadee April 3: 4 [in a flock] at suet; April 20: 1
11. Blue Jay April 3: 2; April 4: 2; April 5: 2: April 6: 3; April 7: 2; April 8: 2; April 9: 2: April 10 :1; April 11: 1: April 12: 1; April 13: 2; April 14: 2; April 15: 1: April 20: 2
12. Flicker April 5: 1 [in full song]; April 6: 1 [in full song]; April 7: 2 [in a flock] 1 [in full song]; April 8: [female]; April 13: 1; April 14: 1 [in full song]; April 15: 1 [in full song]; April 17: 1 [in full song]; April 18: 1 [in full song]; April 19: 1 [in full song]; April 20: 1 [in full song]
13. Sparrow Hawk April 6: hd. [heard] many times towards Horsfords’.
14 Bluebird April 7: [male in full song] full song hd [heard] sev. [several] times not far off at 3 P.M. Bird unseen; April 8: [male] in Chauncy Smith Pl [Place] Seen by O. Bangs [Outram Bangs]; April 18: flight call hd. [heard] faintly
15. Song Sparrow April 8: 1 silent bird in flower garden; April 9: 1; April 14: 2 [in a flock] 1 [in full song]; April 15: [male in full song]
16. Hermit T. [Hermit Thrush] April 13: 1 at poultry yard; April 20: 1
17. Chippy [Chipping Sparrow] April 20: 1 [in full song] Hubbard Park; April 21: 1 [in full song]; April 22: 1 [in full song]
18. Ruby crown K. [Ruby-crowned Kinglet] April 20: [male in full song] in lilacs; April 21: [male in full song] (Percy Harris); April 22: 2 [males in full song] (Percy)
19. Goldfinch April 21: call note heard; April 22: ad. [adult male] in larch
20. Pine Linnet April 22: 20+ in Eu. Larch [European Larch] 9 to 10 A.M.