Male to male combats in whip and Montpellier snakes: do they pick a fight?
Combats entre mâles chez les couleuvres verte et jaune et de Montpellier : les protagonistes recherchent-ils le contact ?
Résumé
We report a case where two males of dark green snake (Hierophis viridiflavus) disturbed during
a ritual combat split away, but shortly after, they were sighted fighting again. Disturbed for a second
time, they were rapidly observed fighting for a third time. Mutual biting was not recorded in any round.
No female was sighted in the vicinity. This suggests that ritual combats may serve to defend an area to
access females, possibly when males follow female’s pheromonal tracks. Furthermore, observations of
captive and free-ranging Montpellier snakes (Malpolon monspessulanus) indicate that some males use
their nasal secretions to mark an area (observed in both sexes) but also to keep adult females and to deter
rivals. Long-lasting ritual combats are exceptional in this species, a single fierce biting clash possibly
producing a winner. Overall, ritual combats and chemical signalling may represent two nonexclusive
means used by males to increase their opportunities to access, court, fertilize and keep reproductive
females.