Migrating Birds and Tickborne Encephalitis Virus
Figure. Autumn migration directions (arrows) of tree pipits (Anthus trivialis), robins (Erithacus rubecula), redstarts (Phoenicurus phoenicurus), and song thrushes (Turdus philomelos) banded in southeastern Sweden (area indicated by a square) and recovered within 60 days. Directions: Tree pipit, 203.6º, mean vector length = 0.993, n = 10; robin, 220.5º, mean vector length = 0.928, n = 293; redstart, 225.9º, mean vector length = 0.975, n = 52; and song thrush, 218.8º, mean vector length = 0.947, n = 117. Recovery sites of birds banded in southeastern Sweden and reported from areas north of the banding sites in a following year are also shown as indicated in the legend (no recovery from breeding areas is available for tree pipit).