Derryvree invites us to view Late Pleistocene Ireland as a shifting patchwork rather than either a frozen island or a tundra. Its freshwater sediments show that aquatic plants and vegetation survived locally between ice advances, while the broad date range and sheltered Fermanagh basin limit wider conclusions. Castlepook’s fauna add evidence of cold-stage animals, yet cannot establish contemporaneous communities or direct links to Derryvree. The modified reindeer bone highlights how environmental opportunity and human presence must be considered separately. What securely dated discoveries would best determine whether Ireland’s wetlands formed isolated refuges or connected routes for plants, animals, and people?