Dutch house martins monitored by brother and sister

This video is about a house martin nest on a flat in Poland.

For the 25th year in a row, house martins are monitored in the Netherlands.

In the area of North Brabant province between Gilze village and the Belgian border, Henk Meeuwsen and his sister Elly have been doing this right from the beginning in 1990.

In their first summer, they counted 463 inhabited house martin nests. This went down to 231 in 1997. After then, things went better for the birds: Henk and Elly predict about 800 to 900 house martin nests this year.

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