Information from Estonian Ornithological Society
Photo Tauri Pärna
Estonian text posted 31.01.2018
The Estonian Ornithological Society asks you to report observations of mad capercaillies.
Abnormally behaving capercaillie cocks and hens that are not afraid of humans, press into gardens and may even attack are referred to as mad. All such encounters from this year but also from earlier dates can be forwarded to the website of the capercaillie, the Bird of the Year 2018: www.eoy.ee/metsis.
The main reason for the abnormal behaviour of capercaillies is thought to be the changes that make their habitats and display (lek) areas no longer suitable for the purpose, the home forest of the capercaillie may for instance have become fragmented or destroyed. “The change in living conditions has often been accompanied by a large decrease in the numbers of capercaillie cocks as well as hens in the area,” Andres Kalamees, manager for the EOY project Bird of the Year explained. ”The madness is probably triggered by an overproduction of sexual hormones because compared to common capercaillie cocks up to five times higher levels of testosterone have been measured for mad cocks.”
The first report of a mad capercaillie in
On the basis of the collected observations the Estonian Ornithological Society will compile an overview of the distribution and frequency of mad capercaillies in
Observations from earlier years are also welcome to the map application on the capercaillie website .Photos and videos of mad capercaillies can be posted in the EOÜ Facebook group or sent to firstname.lastname@example.org.
More to read about the capercaillie and other forest Galliformes birds is on the website of the Bird of the Year: www.eoy.ee/metsis (in Estonian)
Andres Kalamees, Coordinator of the Bird of the Year project