Genesis 8:7

And he sent forth a raven, which went forth to and fro, until the waters were dried up from off the earth.

1. Noah released a raven, which, rather than returning to the ark, apparently flew about, probably from tree to tree, until the waters were dried up.
2. Ravens may not enjoy being couped up on a boat, so think twice about taking one on a voyage.
3. Ravens are not ground-dwelling birds, but are content living in tree tops.