We performed these experiments in October 2019 at the "Crocoparc" zoo (Agadir, Morocco). We worked with naive juvenile Nile crocodiles (Crocodylus niloticus) hatched in captivity (n = 8 individuals; three months old; 36 ± 2 cm length). These animals were housed together in an exterior enclosure not visible by the public. They had never been included in any experiments before. Each crocodile subject was tested during only one experimental session.
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