In the latest issue of Acta Ornithologica (Volume 40, Issue 1) two new articles about birds' vocal communications were published:
Polak M Temporal pattern of vocal activity of the Water Rail Rallus aquaticus and the Little Crake Porzana parva in the breeding season ACTA ORNITHOLOGICA 40 (1): 21-26 SUM 2005 Volodin IA, Volodina EV, Klenova AV, et al. Individual and sexual differences in the calls of the monomorphic White-faced Whistling Duck Dendrocygna viduata ACTA ORNITHOLOGICA 40 (1): 43-52 SUM 2005 - Tomasz
