Research institution: Wildlife Society "Bocian" from Poland
We research the Montagu's harrier population in highly agricultural landscape of central-east Poland. Main goals of the research are: determining the size of the home ranges, analysis of habitat selection and knowledge of migration routes and wintering areas of the Montagu's Harrier, including the location of roosting place. More on www.pygargus.pl (in Polish).
Tracking device: Milsar RadioTag-14
Example data - before migrationOne of males, example KML file automatically generated from data from 2.5 days (2016-07-04 12:20:14 - 2016-07-06 17:53:15). Position registered every 5 minutes.
One of males, located 32 kilometers apart from previous one, example KML file automatically generated from data from 3 days (2016-07-05 10:42:53 - 2016-07-08 13:13:17). Position registered every 5 minutes.
Data from seven harriers, each harrier depicted using different color:
Example plot from about 7 days, created using included application. Plot shows loggers voltage and current speed taken from GPS. Positions were registered every 5 minutes.
Remarks to this plot:
- We can see daily fluctuations of voltage: Logger uses a bit energy from battery during night and charges up during the day. However, in this conditions battery is almost completely full whole time, even after night. Voltage is constantly above 4.0V, and we can consider such voltage level as full battery.
- This is of course very simple plot (included application allows to plot more than 20 parameters), yet it allows to infer about daily activity rhythm (from speed, we can see when harrier was sleeping).
- That kind of plots (and much richer ones) you can quickly get in the field with several clicks in included application. Users found it very useful and convenient.
... and what you've been waiting for - data from migration :-)Researchers collected big amounts of very nice data. They set loggers to collect records with 5 min interval, which resulted in collecting over 64000 records from migration per bird! See some screenshots of data from one bird below:
Couple more pictures from attaching loggers: