Yandex’s bots

Yandex runs one bot tidekeeper knows by name.

Its bots

Yandex’s own page on them: yandex.com/support/webmaster/en/robot-workings/check-yandex-robots.html

Keep one out

A crawler reads by the group that names it. To keep it out:

User-agent: YandexBot
Disallow: /