© Tommy Holden

Black-headed Gull - Larus ridibundus
Reporting rates for Britain and Ireland



The graph below shows the reporting rate for Black-headed Gull by region. The reporting rate is a measure of the proportion of gardens which observed Black-headed Gull during a particular week.

Black-headed Gull: This species is still largely a winter visitor to relatively few gardens.

Reporting rate by species per week

Plot of wrate * newdate

Average Monthly Reporting Rates

Plot of mean_rep_rate * fudgedate



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