1981 (Fifty-Sixth) Spring Migration and Occurrence Report
Copyright 1981, Nebraska Ornithologists' Union. Used by permission.
Two hundred ninety-eight species are listed in this report, from 12 locations. The comparable figures from 1980 are 298 species from 14 locations; 1979 292 from 12; and 1978 300 from 13.
The symbols used in tabulation are:
Ja, Fe, Mr, Ap, My, and Je for the months
P to indicate a species which is present all the year, although the same individuals may not be present during the whole year, and the numbers may vary greatly between periods.