0829hs local time; comparison of local hypoleuca ssp. with migrant australis ssp. For a description of vocal dialects in this species, with spectrograms, .aiff & .wav sound files, see: http://publish.uwo.ca/~handford/dialects.html
0829hs local time;
comparison of local hypoleuca ssp. with migrant australis ssp.
For a description of vocal dialects in this species, with spectrograms, .aiff & .wav sound files, see: http://publish.uwo.ca/~handford/dialects.html