>> GENERAL >>>>>
– medium-sized passerine, size of Common Blackbird
– Asian species, extremely rare vagrant to WP
– nocturnal migrant, migration may continue during the day
– in Asia migrates singly or in loose flocks
>> VISUAL ID >>>>>
Red-throated Thrush Turdus ruficollis, AD M
BIF1912, 09/06/2016, Khövsgöl, Mongolia, Mathias Putze
Red-throated Thrush Turdus ruficollis, AD M
BIF1913, 09/06/2016, Khövsgöl, Mongolia, Mathias Putze
Red-throated Thrush Turdus ruficollis, AD M
BIF1914, 13/06/2016, Khövsgöl, Mongolia, Mathias Putze
Red-throated Thrush Turdus ruficollis, AD M
BIF1915, 13/06/2016, Khövsgöl, Mongolia, Mathias Putze
>> ACOUSTIC ID >>>>>
– very vocal
– utters different calls in flight
– on long distance flights most typical a short two-voiced whistle, 0,2s in length
– distinct shape in spectrogram: a narrow upper, and parallel, a broader modulated lower band
– 1st partial dominant frequency band between 3,1 and 3,9kHz
– the 2nd partial usually the ‘loudest’
– inharmonic partials
– very similar to Black-throated Thrush but the lower band is much narrower modulated
Red-throated Thrush Turdus ruficollis, AD, flight calls before take-off
BIF1930, 25/05/2013, Ider Gol, Mongolia, Patrick Franke
>> COMPARISON SPECIES >>>>>
Black-throated Thrush (v) (a)
#thrush #passerine
#birdmigration #ornithology #birdID #workinprogress