CAGU

  • Thayer & Barnes (2025)

    We have monitored Alcatraz seabird population size, breeding phenology, and productivity since the island was colonized by Brandt’s Cormorants in the early 1990s. Disturbance to wildlife is a concern because Alcatraz is the most heavily-visited tourist destination in Northern California. Island visitation returned to full capacity in 2022 following two years of reduced or no…

  • Moorhouse (2024)

    Scott Moorhouse (High Arctic Gull Research Group) is continuing his studies of Iceland Gulls (Larus glaucoides thayeri), including completing additional work on the occurrence, distribution, abundance, habitat use, and behavior of wintering L. glaucoides thayeri in central California. Fieldwork was completed in March 2023 and a paper on the work was accepted for publication by…

  • Post & D’Amico (2024)

    Maggie Lee Post, Julie Thayer (Farallon Institute), and Lidia D’amico (National Park Service, Golden Gate National Recreation Area) continued the long-term monitoring of breeding seabird colonies on Alcatraz Island in San Francisco Bay. Brandt’s Cormorants (Urile penicillatus) nested in the highest numbers (n=4825) ever observed in the time series. Though heavy rain storms in early May flooded…

  • Hipfner (2024)

    Mark Hipfner (Environment and Climate Change Canada (ECCC), Delta – Wildlife Research Division (WRD)) reports that summer 2023 marked the 30th year of operation of the Centre for Wildlife Ecology’s (CWE) seabird research program on Triangle Island. The 2023 field crew consisted of Hannah Avenant and Alice Domalik (ECCC, Delta – Canadian Wildlife Service), Sarah…