On St Eustatius, the red-bellied racer is most active during the morning and late afternoon, with a lull around midday to avoid the high temperatures (6).
The red-bellied racer is known to predate upon young rats and small lizards (3), particularly Anolis spp., with which it is closely associated (5). It is an active hunter during the day, sliding between rocks and through leaf litter, using tongue-flicking to detect potential victims. The red-bellied racer will occasionally venture into burrows in search of prey (5).
Racers of the Alsophis genus are rear-fanged and are known to use venom to subdue their prey (7). Individuals have also been observed consuming lizard eggs, probably belonging to the same Anolis lizards which they prey upon (8).
There has been little research into the breeding habits of the red-bellied racer, but other racers are known to give birth to live young (2).