Northern Map Turtle

Snapshot

The widespread “common” map turtle — females to ~10.5 inches, males smaller — olive shell with map-like lines, low keel without big spines, small triangular postorbital blotch. River/lake basker. Native where drainages allow; leave alone.

Photos

(Photos pending — see photos/northern-map-turtle/MANIFEST.md.)

Description and identification

SREL (as Common Map Turtle): females to ~10.5 in, males usually <6.2 in. Olive carapace with faint yellow topographic “map” lines (may darken or algae-cover). Shallow midline keel without distinctive spines/knobs. Small rounded-triangle postorbital blotch; J-shaped yellow neck line arching toward the head. Female jaw enlargement milder than in Barbour’s/Alabama maps.

Look-alikes

Barbour’s map — black-tipped keel knobs; Apalachicola system. Alabama map — megacephalic females; Coosa/Mobile. Co-occurs with Alabama map in northwestern Georgia Coosa waters — use head marks and keel shape.

Range in Georgia

Wide northern/eastern distribution with southeastern Gulf-drainage pockets. In Georgia, expect northwestern Coosa / Tennessee-drainage contexts rather than every statewide river. Prefers large rivers, big streams, and lakes (SREL). Not present in every Georgia drainage.

Habitat preferences

Large water bodies with abundant basking sites — rivers, large streams, and lakes rather than tiny creeks and ponds. Clear flowing water with gravel substrates preferred; wary baskers that dive at disturbance. Northwestern Georgia Coosa / Tennessee-drainage context is the local educational emphasis.

Natural history

Breed spring and fall; nest late May–mid-July on open sandy beaches/sandbars near water — laying may take many hours overnight. Clutch averages 10–12 eggs; females may produce 2–3 clutches/year; incubation ~75 days; hatchlings often overwinter. Males mature ~4–6 years; females often >10 years. Day-active mollusk/insect feeders; hibernate exposed in deep slow pools rather than buried in mud. Nest predators include raccoons, skunks, foxes, and otters.

Food preferences

Snails, crayfish, mussels, and aquatic insects; little deliberate vegetation (incidental). Large females more mollusk-oriented.

Temperament and encounters

Binoculars on a mid-river log — don’t approach nests on sandbars.

Conservation and legal notes

Continentally IUCN Least Concern / most widespread map turtle, but Georgia Rare under Rule 391-4-10 (listed as Common Map Turtle). Sensitive to water-quality decline and mollusk loss; protect basking snags and nesting banks.

In Georgia, native turtles are wildlife. Many species are protected nongame animals; some are state- and/or federally listed. Possession, take, sale, and nesting-beach disturbance rules are species-specific — check current Georgia DNR and USFWS guidance before any collection or relocation. Do not invent statutes. Roads, habitat loss, bycatch, and illegal collection drive many declines. Educational observation from a distance is the default.

If you meet one

Give the animal room. Do not pick up wild turtles except to move one safely off a road in the direction it was traveling (never relocate to a new wetland). Do not dig into nests or burrows. Keep dogs from chasing wildlife. Report injured or stranded sea turtles and listed freshwater species through current Georgia DNR / sea-turtle stranding channels. Local educators — including community resources around Cartersville such as Etowah Valley Exotics when appropriate — can help with distant photo ID. This profile is educational, not a husbandry or collecting guide.