Fig. 2
a Nails inserted into the nest entrance prevent predator access to the nests. b A video-recording box extension. See Methods for explanations. Photo credits: Tomáš Grim
Fig. 2 | BMC Evolutionary Biology
a Nails inserted into the nest entrance prevent predator access to the nests. b A video-recording box extension. See Methods for explanations. Photo credits: Tomáš Grim