Observer 151 The Science of Oil Spill Response (Winter): The Cosco Busan oil spill in San Francisco Bay, in November 2007, prompted a wildlife response in which PRBO plays a lead scientific role. Our oil spill expertise has developed over 35 years of investigating the large-scale impacts on bird populations.

Observer 150 Units of Conservation (Fall): PRBO's work in conservation science has multiple, complementary pespectives, from single species to suites of indicator species, to entire ecosystems.

Observer 149 Southeast Farallon Island (Summer): PRBO's invaluable insight into the California Current marine ecosystem, gained from constant data-gathering on Southeast Farallon Island since 1967, is a powerful scientific lens on environmental change including global warming.

Observer 148 Discoveries and Directions (Spring): From shorebirds migrating throughout the Pacific Basin, to seabird indicators of the marine ecosystem, PRBO studies are yielding valuable new information

Observer 147 Winter Field Work (Winter): PRBO conducts ecological field work throughout a hemisphere, seeking critically needed knowledge about avian species and populations throughout the annual cycle.