Mink on the brink: comparing survey methods for detecting a critically endangered carnivore, the European mink Mustela lutreola by Croose, E, Hanniffy, R, Harrington, A, Põdra, M, Gómez, A, Bolton, PL, Lavin, JV, Browett, SS, Pinedo Ruiz, J, Lacanal, D, Galdos, I, Ugarte, J, Torre, A, Wright, P, MacPherson, J, McDevitt, AD, Carter, SP, Harrington, LA