Out and about for CropMix

Science
Today’s task is a field bird count on the CropMix farms in the districts of Twente and the Achterhoek.

WUR but not WUR

Science
Dead European Shag with WUR-tag has nothing to do with WUR.

Column Sjoukje Osinga: Bird language

Spring is in the air and so are the birds.

A little wiser: Why do some birds migrate south in winter?

Science
Some birds migrate south, some not. What's the decisive factor in this?