Seabirds are a diverse mix of birds from all kinds of different orders that are ultimately characterized more by their functional reliance on marine habitats than any taxonomic similarities between them. The galleries here are loosely organized around taxonomic groupings: you can find the pelagic, tube-nosed fulmars, shearwaters, and petrels grouped together; gannets, boobies, and pelicans in another, but there's also a bit of overlap and some categories (e.g., shorebirds) are almost entirely functional divisions. You'll find dippers and waders in there, but also several species that are visitors to the coasts rather than completely reliant on it. As always, if you're looking for something specific, you can use the site's image search to narrow it down.