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Pete the penguin, who was travelling back home to San Diego's SeaWorld theme park, had been appearing at a show in San Francisco

The on-board crew allowed him to stretch his legs during the 90-minute flight from San Francisco to San Diego, much to the amusement of his fellow – human – passengers.

Pete's SeaWorld keepers, who had taken the Arctic bird to a national science convention, took the opportunity to give people on the flight a free lecture on penguins. South American Magellan penguins such as Pete are classified as a threatened species

Videos of Pete the penguin uploaded by passengers on the flight began to appear on the web last week.

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