Why #frigatebirds can't float? https://www.audubon.org/news/why-frigatebirds-cant-float

The #seabirds can stay aloft over the open #ocean for months, but they don't really have a choice. Their #feathers — unlike those of nearly all other sea #birds — are not #waterproof. Instead, the #frigatebird is a master of staying aloft. Tracking devices placed on frigatebirds near #Madagascar showed that they often stay in the air for a month and half at a time.

Why Frigatebirds Can't Float

The seabirds can stay aloft over the open ocean for months, but they don't really have a choice.

Audubon