BIRM-166 is especially compelling because it shows how a single organic silt layer can complicate broad images of Ice Age Ireland. Rather than depicting a uniformly frozen island or a straightforward refuge for people and animals, the Fermanagh wetland suggests shifting local opportunities between ice advances. Considered alongside Castlepook’s mixed faunal record, it raises questions about how far varied habitats were connected across the island through changing coastal routes. Unproven human modification of reindeer bone makes this environmental mosaic significant. How should researchers weigh wetland evidence, cave assemblages, and route reconstructions when assessing brief versus repeated human use in Ireland?