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Droppings for hormones

5 July 2020

Margje and Rienk are working for a project designed by Isabella Scheiber. They want to see variation in hormone levels over the day and over the season. The hormones can be measured in goose droppings. But now they have to collect droppings of selected individuals, prefereably those wearing a neckband, which shows their position during migration. This is a lot of work. They observe the geese and follow them until they see a dropping fall. Than they freeze the telescope and when the geese have left, one of them is going to collect exactly that dropping. When the proper one is in a tube, they are quite satisfied.



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grass growth droppings for hormones incubating arctic tern