Migration and Survival of the Birds of Asia.
Final rept. 11 Jul 66-30 Jun 73,
APPLIED SCIENTIFIC RESEARCH CORP OF THAILAND BANGKOK
Pagination or Media Count:
There were 82 families of birds represented in this study. The average number of birds ringed per family was 14,197 and per species was 954 however, 19 families accounted for 92.1 of the ringed birds. Among these there were 15 species which made up 59.6 of the total and of these the House Swallow Hirundo rustica made up 24.2. Forty-four of the families had less than 1500 birds marked per family, totaling only one percent of the birds ringed. The remaining 38 families averaged 30,340 birds per family. The average among the 15 highest species was 46,000. Without the House Swallow the average per species was 29,000. The remaining 1201 species averaged only 389 birds marked per species. When the 19 high families are deducted from the total, the remaining 63 families averaged only 1458 birds per family. Modified author abstract