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First, if you're eating, the birds always seem to be circling, hoping you take your eyes off your plate. Sometimes birds can be incredibly aggressive, dive-bombing your table or literally trying to take food out of your hands.

A Royal Caribbean crew member, Bryan James, a guitarist for the cruise line, shared how birds are kept away from cruise ships when they're in port. It's actually a fairly ingenious method that you may not have even noticed when you're on board.

Related: Royal Caribbean has a 2025 gift for passengers Having birds around is also messy because birds do not practice any sort of good bathroom hygiene. They go wherever they happen to be, and their stuff can create messy seating and tables and/or end up in your food.