Movie of the horned-frog Proceratophrys boiei regurgitating a cricket after being stimulated with the scent gland secretion of the harvestman Acutisoma longipes. This movie was done during the study “Chemical defense in harvestmen (Arachnida: Opiliones): do benzoquinone secretions deter invertebrate and vertebrate predators?”, published by Machado and collaborators in the Journal of Chemical Ecology (2005, 31: 2519-2539).
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