Density Map on Bird Migration

Number of Occurrences
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Step size of time window:   Round grid cells


The map shows the number of occurrences of gulls (Larus argentatus and Larus fuscus) within the selected time window.

The data set is based on bird observations and consists of over 8 million events. Each event represent the observed occurrence of one gull.

We have derived the events from the data set Bird tracking -- GPS tracking of Lesser Black-backed Gulls and Herring Gulls breeding at the southern North Sea coast. Version 5.6, obtained from Global Biodiversity Information Facility. DOI: 10.15468/02omly

We do not assume any warranty and liability for the accuracy of the data, but the only purpose of this map is to showcase the developed data structure and its applicability.


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