Even more striking is the relation to a large-scale phenomenon, the North Atlantic Oscillation (NAO), during the last four decades. Again, in 23 out of the 24 species, an earlier msp-time coincides ...

Journal of Avian Biology, Vol. 36, No. 3 (May, 2005), pp. 210-221 (12 pages) We studied long-term trends and the yearly variation in mean spring passage time in 36 passerine bird species trapped at ...