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期望数量
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, 2 kilometer traveling checklist at the optimal time of day for each species.
了解更多Weekly Relative Abundance
0.090.250.5
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Week of the Year
4日 1月
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Playback Speed 0.25 sec
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Draw a shape on the map to generate a summary table or chart for that custom area of interest.