In this adventurous recording there is a duet. Two birds in front of a recording horn from the 1910-1912 period. All of these blue labeled Victor recordings were pressed in the 1913-15 period..Rather than being on the Red Seal the other birds were on blue label records. in which all would be in time. But this is an example of an early 1913-15 style label.
Here is the lovely song of a Sprosser (also known as a field Nightingale)
The second recording of a Nightingale made in 1910.
Lastly the song of a Thrush. Recorded in the 1910 -1912 period. Recorded before the World Wars and the dreadful destruction of the of the age in which these recordings were made. A rare and unique series of recordings.