 Jourdain produced several ornithological papers, although many were started but never finished, and authored or contributed to a number of books, notably the sections on Breeding-habits, Distribution Abroad and Food in the "Handbook of British Birds" (1938–41).He was assistant editor of "British Birds", the "illustrated (monthly) magazine devoted to the birds on the British list", from 1909 onwards (until his death in 1940).He was also assistant editor of "The Ibis" from 1931 onwards and co-editor of "The Oologists Record" from 1935 onwards.