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Initiated in 1984, migration monitoring is the longest running program established at the BBO. Migration monitoring is a means of documenting changes in abundance of northern-nesting species across broad geographic scales that are relatively inaccessible for breeding season surveys
These methods are also used at over two dozen stations across Canada who belong to the Canadian Migration Monitoring Network (CMMN), which BBO joined as a full member in 1992.
CMMN is a cooperative venture among:
Migration monitoring requires substantial effort by skilled staff and volunteers, and ongoing financial support for infrastructure and salaries.