Real gaps in European bird monitoring: A reply to Voříšek et al.
F.T. Wetzel,
D.S. Schmeller,
H.C. Bingham,
Q. Groom,
P. Haase,
U. Kõljalg,
M. Kuhlmann,
C.S. Martin,
L. Penev,
T. Robertson,
H. Saarenmaa,
S. Stoll,
J.D. Tonkin,
C.L. Häuser Publication
Biological Conservation