I’m going to presume that sometimes sailors, when looking for land, will at some point follow birds thinking they will lead the ship to land. In this instance they’ve found two albatrosses. Unfortunately, albatrosses can fly 10,000 miles in a single journey, so they could theoretically be very far from land. The albatrosses don’t realize the intent and just think they’re being followed.
That’s very interesting, though i think in this context that background info might be being used as a pun since the albatrosses are the ones being followed in the comic.