Sirin and Alkonost by Lilia Osipova
Sirin and Alkonost, paradise birds of joy and sorrow.
The Sirin sang beautiful songs to the saints, foretelling future joys. For mortals, however, the birds were dangerous. Men who heard them would forget everything on earth, follow them, and ultimately die.
The Alkonost makes sounds that are amazingly beautiful, and those who hear these sounds forget everything they know and want nothing more ever again.