Raw and summarized count data from annual colonial water survey conducted at West Sister Island NWR. Breeding pair estimates were calculated for all years using 3...

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Aerial photos and colony counts of nesting colonial waterbirds in the Columbia River Basin, 2023

In many situations, colonial waterbird colony size is best evaluated from aerial photographs taken during the breeding season. This is typically the case where colonies are not accessible or when it

DataCite Commons2025-06-01 更新30

Aerial photos and colony counts of nesting colonial waterbirds in the Columbia River Basin, 2024

In many situations, colonial waterbird colony size is best evaluated from aerial photographs taken during the breeding season. This is typically the case where colonies are not accessible or when it i

DataONE2025-06-17 更新190

Colonial waterbird survey counts