From the Super Mario Wiki
Sad Raven is an enemy found on Vibe Island in the game, Super Princess Peach. Sad Ravens are different from normal Ravens in that they are a light blue color and are always crying. In fact, their cries get so loud, they stun Princess Peach for a few seconds.
According to the game's Glossary, it is "[s]o sad, it sometimes causes earthquakes."
Names in other languages