Reptile abundance, but not species richness, increases with regrowth age and spatial extent in fragmented agricultural landscapes of eastern Australia

•Relative abundance of reptiles in fragmented agricultural landscapes increases with remnant forest extent.•Small-bodied and less-vagile reptiles increased with extent of old regrowth.•Fragmentation did not affect landscape-level richness or abundance.•Remnant and old (>30years age) regrowth forest extent drive landscape-level reptile responses.•Allowing cleared forests to regenerate may be a cost-effective restoration strategy.