Table 1.

Average sizes of PPVs for departure and return trips and for bird trajectories sampled at different temporal sampling resolutions

Resolution	No. of birds	Trip type	Average PPV (km3)	St Dev (km3)
5 min	18	Departure	7000	1732
		Return	8324	2361
10 min	34	Departure	82,151	19,538
		Return	50,592	14,932
30 min	16	Departure	93,955	27,688
		Return	333,131	94,857