Graham’s crayfish snake is active between April and early November (4), when it can be found basking on rocks (2) or on tree branches hanging over water (2) (4). When it is not basking, this species is known to take shelter underneath logs, rocks or disused crayfish burrows (4). While hibernating during the winter, Graham’s crayfish snake either excavates its own burrows or utilises those made by crayfish (2). Although this species is usually active during the day, it may become nocturnal during periods of hot weather (4).
The mating season usually occurs between late April and May (2) (3) (4), when small mating balls are formed with one female and many males (3). The average litter of Graham’s crayfish snake contains between 4 and 39 young (3) (4), although around 15 is most common (3), with the female giving birth to live young rather than laying eggs (4). The young are generally born from late July to September (2) (4).
The diet of Graham’s crayfish snake is composed mainly of freshly moulted crayfish (4), although fish and frogs are also taken (2)