Note 48 — BULLETIN OF THE NUTTALL ORNITHOLOGICAL CLUB. VOL. VII. April, 1882. No. 2.
Reading edition
The English Sparrow, which is but an indifferent flyer, can be deprived of one-half of the secondaries and one-fourth of the primaries of both wings, in the long axis of the pinion, without apparently impairing its flight. See Pettigrew.