Table 3. Parameter estimates and details of the most competitive models of Table 2, depicting the relationship between the route length (1) or migration speed (2) of 36 satellite-tagged Black Kites and Device Type (Argos vs GPS) and data filtering Approach (Approach 1–4).

Most competitive model	Parameter estimate ± SE	t-value	P
(1) Response variable: route length (km)
Device Type	518.7±93.5	5.0	<0.0001
Approach 2	−300.9±93.5	−4.5	<0.0001
Approach 3	−289.8±93.5	−3.9	0.0001
Approach 4	−454.9±93.5	−6.5	<0.0001
Device Type *Approach 2	198.8±132.2	2.6	0.0112
Device Type *Approach 3	−381.4±132.2	−2.2	0.0307
Device Type * Approach 4	−354.2±132.2	−1.7	0.0883
Intercept	2694.9±132.2	302.9	<0.0001
(2) Response variable: migration speed (km d−1)
Device Type	82.1±10.6	7.3	<0.0001
Approach2	−30.9±10.6	−3.8	0.0002
Approach3	−32.4±10.6	−3.4	0.0009
Approach4	−45.2±10.6	−5.4	<0.0001
Device Type * Approach 2	28.2±15.0	2.6	0.0108
Device Type * Approach 3	−33.1±15.0	−1.5	0.1321
Device Type * Approach 4	−35.1±15.0	−1.2	0.2502
Intercept	256.4±15.0	142.5	<0.0001