Simargl (a dog with a body of a bird) is one of the most ancient creature of the Indo-Iranian mythology who lives on the tree of all seeds and who drops the seeds on the ground. Therefore they became a symbol of fertility. An image with a pair of Simargle also supports the idea of fertility. Another important function of Simargle was to be a mediator between the worlds and to rescue lost travelers.
The image of simargle depicted on these earrings is taken from the painting on the South door of the Cathedral of Nativity in Suzdal (XIII century).
Noisy pendants for earrings are supposed to protect from evil forces. The noise made by them since very ancient times was considered to be protection against harmful forces. All the noisy pendants were also associated with the cult of fertility and well-being.