Optimising the use of bio-loggers for movement ecology research by Williams, HJ, Taylor, LA, Benhamou, S, Bijleveld, AI, Clay, TA, De Grissac, S, Demšar, U, English, HM, Franconi, N, Gómez-Laich, A, Griffiths, RC, Kay, WP, Morales, JM, Potts, JR, Rogerson, KF, Rutz, C, Spelt, A, Trevail, AM, Wilson, RP, Börger, L