Think of them as passport photos for Bermuda’s greatest repeat visitors.

With the first humpback whales of the season already spotted off Bermuda, the Humpback Whale Research Project is asking for the public’s help compiling a photographic catalogue of these migratory animals’ unique fluke markings — allowing for individual identification.

With the island lying halfway between the humpback whales’ feeding grounds in the western North Atlantic and the wintering and breeding grounds in the Caribbean, Bermuda serves as an ideal observation platform to study the annual northward migration of these animals during the spring months of March and April.