Left: Ashy Storm Petrel and Chick, NPS photo
Top Right: Seagull, Jessica Weinberg
Lower Right: Xantus Murrelet Chick, NPS photo

The Channel Islands provide nesting and feeding grounds for 99% of seabirds in the region and are home to the largest seabird colonies in southern California. They host half of the world’s population of ashy storm-petrels (Oceanodroma homochroa) and western gulls (Larus occidentalis) and 80% of the nation’s breeding population of Scripps's (Xantus) murrelets (Synthliboramphus hypoleucus). In addition, the islands are home to the only major breeding population of California brown pelicans (Pelecanus occidentalis californicus) in the western United States. Seabirds are at risk from pollution, changes in their food supply, climate change, invasive species, and human activities.