Hydrobates Pelagicus is commonly known as the European Storm Petrel, a small bird that is found in the eastern Atlantic Ocean and the Mediterranean Sea. It has a black and white plumage with a distinctive shape, making it easy to spot in the open ocean. Synonyms for Hydrobates Pelagicus include the Black-bellied Storm Petrel, Ocean Swallow, and the Fregetta Storm Petrel. These names are used interchangeably depending on the region where the bird is found. Regardless of the name, Hydrobates Pelagicus is a fascinating bird that has adapted well to life at sea, and can be observed during oceanic expeditions or birdwatching ventures.