Table 1.
Number of devices and locations collected during stationary and deployment tests.
Fig 1.
Horizontal and vertical accuracy and precision of devices programmed in different GPS fix intervals.
Horizontal (A) and vertical (B) accuracy, and horizontal (C) and vertical (D) precision in meters of devices programmed with fix intervals of 1 minute, 20 minutes and 60 minutes. The box represents 25, 50 and 75% of the data and the error bar represents 5% and 95% of the data.
Fig 2.
Horizontal and vertical accuracy variability of devices programmed on a 20 and 60 min GPS fix interval.
Horizontal (A) and vertical (B) accuracy of tracking devices programmed to collect GPS locations every 20 and 60 minutes. The error bars represent 95% confidence intervals.
Fig 3.
Identification of inaccurate positions in different GPS fix intervals.
Percentage of locations with horizontal and vertical error larger than 10 meters for each device, and after removing the points with largest GPS-Error and remaining with 99%, 97%, 93%, 95% and 90% of the original data. The dash line indicates 1% of locations with vertical and horizontal errors larger than 10 meters.
Fig 4.
Cumulative frequency of horizontal and vertical accuracy before and after deployment on white storks.
Cumulative frequency of (A) horizontal and (B) vertical errors (in m) of 16 GPS/GPRS devices before deployment (grey dashed line) and after deployment on white storks (black line). Shaded areas represent the standard deviation of the errors.
Fig 5.
Position of the tracking devices on the back of pre-fledging white storks.