Colonial and Non-Colonial Birds Breeding on Dredge-Spoil Islands in a Tropical Wetland in Mexico
Germán Leyva-García,
Jaqueline García-Hernández,
José Alfredo Castillo-Guerrero
et al.
Abstract:In 2012, 11 small islands were created by the deposition of sediment from dredging operations in connection with the creation of navigation channels, along the main canal of Bahía Tóbari, Sonora, Mexico. During the breeding seasons of 2017-2019 and 2021-2022, we conducted repeated boat surveys each season, and documented 12 species of birds breeding on these islands, including eight species of colonial waterbirds, three shorebirds, and one owl. The number of breeding species varied between 7 (2017) and 11 (201… Show more
“…Hogan and Sidler (2023) used boat-and photograph-based censuses of Thick-billed Murres (Uria lomvia) between 2002 and 2021 to show annual variations but also an increase in numbers since previous counts. Leyva-García et al (2023) conducted a multi-year study to show how artificial islands created from dredging operations served as excellent breeding sites for several waterbird species. These included six species recognized to be locally threatened and five species that were not known to breed locally before the islands were formed.…”
“…Hogan and Sidler (2023) used boat-and photograph-based censuses of Thick-billed Murres (Uria lomvia) between 2002 and 2021 to show annual variations but also an increase in numbers since previous counts. Leyva-García et al (2023) conducted a multi-year study to show how artificial islands created from dredging operations served as excellent breeding sites for several waterbird species. These included six species recognized to be locally threatened and five species that were not known to breed locally before the islands were formed.…”
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