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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Campbell, D.C. | 1920 | Birds: their habits, haunts and homes | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Foster, N.H. | 1920 | Bewick's swan in Co. Down | Journal | Ir. Nat. | Details... |
| Foster, N.H. | 1920 | Greenland falcon at Lambay | Journal | Ir. Nat. | Details... |
| Foster, N.H. | 1920 | Migration of goldfinch, lesser redpoll and lapwing | Journal | Ir. Nat. | Details... |
| Horsbrough, C.B. | 1920 | Hunting for the living bird of paradise in British New Guinea | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Malcomson, H.T. | 1920 | Honey buzzard near Belfast | Journal | Ir. Nat. | Details... |
| Malcomson, H.T. | 1920 | Great black-backed gull nesting in Co. Down | Journal | Ir. Nat. | Details... |
| May, G.C. | 1920 | Jer or greenland falcon at Lambay | Journal | Ir. Nat. | Details... |
| Moffat, C.B. | 1920 | New book on birds - a correction | Journal | Ir. Nat. | Details... |
| Moffat, C.B. | 1920 | The colours of birds in relation to their habits | Journal | Ir. Nat. | Details... |
| Moffat, C.B. | 1920 | Review: 'The heron of Castle Creek, and other sketches of bird life' by A.W. Rees | Journal | Ir. Nat. | Details... |
| Morrison, R.N. | 1920 | Bewick's swan in Co. Down | Journal | Ir. Nat. | Details... |
| Patten, C.J. | 1920 | Sora rail at Slyne Head, Co. Galway, a bird new to Ireland | Journal | Ir. Nat. | Details... |
| Patten, C.J. | 1920 | Remains of little gull at Slyne Head Light-Station | Journal | Ir. Nat. | Details... |
| Patten, C.J. | 1920 | Sanderlings obtained on migration from Slyne Head Light-House | Journal | Ir. Nat. | Details... |
| Ruttledge, R.F. | 1920 | Some notes on the habits of the wren | Journal | Ir. Nat. | Details... |
| Ruttledge, R.F. | 1920 | Pied flycatcher and turtle dove in Achill | Journal | Ir. Nat. | Details... |
| Ruttledge, R.F. | 1920 | Little stint and fork-tailed petrel obtained on migration | Journal | Ir. Nat. | Details... |
| Ruttledge, W. | 1920 | Velvet scoter and other birds at Mutton Island, Co. Galway | Journal | Ir. Nat. | Details... |
| Tomlinson, W.J.C. | 1920 | The quail in Co. Antrim | Journal | Ir. Nat. | Details... |
2846 references found.