White-tailed deer are Missouri’s most frequently recorded mammal, and the data behind that rank one spot is unusual: every one of the 3,574 occurrences comes through GBIF rather than iNaturalist, which points to structured harvest or survey reporting feeding these numbers rather than casual trail photos.
Mingo National Wildlife Refuge and Big Oak Tree State Park sit in the Bootheel’s bottomland swamp and old-growth forest, dense cover with mast-bearing oaks that deer browse through. Swan Lake National Wildlife Refuge, farther north, adds managed wetland and grassland edge to that mix. None of the three prove deer are thicker there than elsewhere; they’re simply where reporting has concentrated.
Records climb from a winter low into a spring high running from April through June, then taper off after summer. That rise likely tracks fawning season and greener understory rather than an actual jump in the deer population.
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