Children (13 direct children, 25 direct and indirect children):
Grass snake
(tree size 11)
Natrix natrix
Dice snake
Tessellated water snake
Large-headed water snake
Natrix megalocephala
Natrix maura
Viperine snake
Natrix longivertebrata
Natrix merkurensis
Natrix mlynarskii
Natrix astreptophora
Red-eyed grass snake
Natrix venningi
(tree size 1)
Barred grass snake
Natrix helvetica
Natrix sulphurea
Natrix suriki
Natrix bitaeniata