I think they do travel by boat because of the breakfast, but anyway:
Link - via iPets
"A pair of turnstones, birds that fly thousands of miles across oceans, are taking the ferry to save themselves a three-mile commute.
They catch the 8.30am boat from Falmouth to St Mawes, where they are served a breakfast of breadcrumbs by the skipper. They land after 20 minutes then spend the day feeding, before catching the 4.15pm back across the River Fal.
The birds, known as Fred and Freda, have been hitching rides on the Cornish ferry every winter for the past six years. So fond are they of the skipper, John Brown, that if he is captaining another boat they will often fly off to find him."
Link - via iPets
--TwoDragons
Also there was a web video of something similar but I cannot find it now.