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Table 1 Methods for estimating the timing of dispersal in juvenile raptors (emigration from the natal home range and independence from parental resources)

From: When do young birds disperse? Tests from studies of golden eagles in Scotland

Method Description Reference
1 First day beyond circular parental territory radius (half the mean nearest neighbour distance) – 2.9 km [20, 21]
2 First day beyond the mean nearest neighbour distance – 5.8 km [20, 21]
3 First day over 20 km from natal nest [16, 20]
4 First day beyond circular parental territory radius (half the inter-nest distance) and not within that distance for 2 consecutive locations [17, 20, 21]
5 First day beyond the mean inter-nest distance and not within that distance for 2 consecutive locations [20, 21]
6 All locations over the mean distance to nest [10]
7 First day beyond maximum ranging distance (9 km) and not within usual range (6 km) for the following 10 days This study
8 Highest coefficient of variation over a 3 record period [20, 21]
9 Highest coefficient of variation over a 5 record period [20, 21]
10 Highest coefficient of variation over a 10 record [20, 21]
11 Highest coefficient of variation over a 30 day period [20, 21]
12 Maximum change in proportion of locations inside natal home range (-30 days: +30 days ) This study
  1. Methods 1-7 are distance threshold methods and 8-11 are coefficient of variation calculated around each day.