Seasonal migration of passeriformes in the vicinity of ukhta komi assr russian sfsr ussr
Vestnik Zoologii 4: 53-57
ISSN/ISBN: 0084-5604 Accession: 006373347
The dynamics of the migration of 36 bird species was studied in 1973-1983. Spring migration of the birds lasted from 60 up to 80 days. Dates when the birds were seen for the 1st and for the last time were presented.