He is the author of
The Birds of Israel and co-author of a definitive work on the genus
Sylvia. He serves as an editorial consultant to leading bird magazines in Europe such as
Dutch Birding and
Birdwatch. Hadoram's main sphere of interest was the complex geographical variation shown by birds breeding in and migrating through the Middle East. He extended his research to Europe, northeast Africa and Asia, publishing
The Photographic Handbook for Western Palearctic Birds (Shirihai & Svensson) and
The Handbook for Geographical Variation of Palearctic Birds (Roselaar & Shirihai). In the mid-1990s, Shirihai turned his attention to oceanic birds and marine mammals, particularly those of the Southern Hemisphere. He published
The Complete Guide to Antarctic Wildlife, and commenced a 10-year project to produce the
Photographic Handbook of Birds of the World. Shirihai has visited almost every subantarctic island and the breeding grounds of all forms of albatrosses, with special interest in plumage variation and identification. In 2008, he confirmed the continuing existence of the mysterious
Beck's petrel (
Pseudobulweria becki), known until then from 2 specimens collected in the 1920s and a handful of tentative sight records. ==Published works==