Ant Identification

Correct identification of ant species is essential because different species require different control methods.

Ants have 3 main body regions:

  • Head
  • Thorax
  • Abdomen

When identifying ants, it is important to know how many petiole nodes and antennal segments they have. Other parts, such as the eyes, thoracic spines, and gaster, are important when identifying an ant species.

 

Name SIZE COLOR(S) NODES ANT. SEGMENTS / CLUBS
Acrobat Ant Acrobat Ant
1/8 in. to 1/4 in.
Yellowish Brown to Dark Brown
N
12 / 3
Allegheny Mound Ant Allegheny Mound Ant
1/8 in. to 1/4 in.
Red and Black
1
12 /0
Argentine Ant Argentine Ant
1/8 in.
Dull Brown
1
12 / 0
Big-headed Ant Big-headed Ant
1/16 in. to 1/8 in.
Lt. Brown to Reddish Brown
2
12 /3
Carpenter Ant Carpenter Ant
Up to 5/8 in.
Black or Dark Reddish Brown
1
12 / 0
Citronella Ant Citronella Ant
1/8 in. to 1/4 in.
Golden Yellow
1
12 / 0
Crazy Ant Crazy Ant
1/8 in.
Dark Brown or Black
1
12 /0
Field Ant Field Ant
1/8 in. to 1/4 in.
Black, Brown, Red or Combo
1
12 /0
Fire Ant Fire Ant
1/6 in. to 1/4 in.
Reddish Brown
2
10 / 2
Ghost Ant Ghost Ant
1/16
Pale w/ Dark Head
1
12 / 0
Harvester Ant Harvester Ant
3/8 in. to 1/2 in.
Reddish Brown
N/A
12 / 0
Little Black Ant Little Black Ant
1/8 in.
Black
2
12 / 3
Odorous House Ant Odorous House Ant
1/10 in.
Brown
1
12 / 0
Pavement Ant Pavement Ant
1/8 in.
Lt Brown to Black
2
12 /3
Pharaoh Ant Pharaoh Ant
1/16 in. to 1/2 in.
Pale Yellow
2
12 / 3
Texas Leaf Cutter Ant Texas Leaf Cutter Ant
1/8 in. to 5/8 in.
Reddish Brown
N
11 / 0
Thief Ant Thief Ant
1/32 in. to 1/16 in.
Yellowish Bronze
2
10 /2
Velvety Tree Ant Velvety Tree Ant
1/16 in. to 1/4 in.
Brown, Red and Black
N
12 / 0
White-footed Ant White-footed Ant
1/8 in.
Black with Pale legs
1
12 / 0

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