Common Swift

Common Swift Apus apus

Abundance animation

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Data provided by eBird

Common Swift

Apus apus


Estimates of relative abundance for every week of the year animated to show movement patterns. Relative abundance is the estimated average count of individuals detected by an eBirder during a 1 hour, 1 kilometer traveling checklist at the optimal time of day for each species.   Learn more about this data

Relative abundance
Week of the year