Animals

Grown-ups

🔍 The 10 smallest animals on Peabody

Small is clever: small animals need less food and can hide almost anywhere.

The top ten

  1. 🐜 Leafcutter ant · 0.079 to 0.47 in2 mm to 1.2 cm1workers of a close cousin, the Mexican leafcutter ant
  2. 🐞 Seven-spotted ladybug · 0.39 in1 cm2up to; ladybugs in general
  3. 🐸 Golden poison frog · 0.59 to 2.4 in1.5 to 6.2 cm3not specific to Phyllobates terribilis
  4. 🐸 Wood frog · 2 to 3 in5.1 to 7.6 cm4
  5. 🦋 Common green darner · 3 in7.6 cm5body length
  6. 🐸 American toad · 2 to 4.4 in5.1 to 11 cm6
  7. 🐦 Ruby-throated hummingbird · 3 to 3.5 in7.5 to 9 cm7
  8. 🦋 Monarch butterfly · 2.8 to 3.9 in7 to 10 cm8wingspan
  9. 🐠 Clownfish · 3.5 in9 cm9maximum length of Amphiprion ocellaris, total length
  10. 🐟 Lined seahorse · 2.2 to 7.3 in5.5 to 19 cm10height of an upright seahorse

How this list is ranked

Ranked by the middle of each animal's sourced length, smallest first.

More Top 10s

  1. National Park Service, Park Science: leafcutter ant Atta mexicana at Organ Pipe Cactus National Monument, checked 30 October 2026.
  2. National Park Service, Ladybug article, checked 30 October 2026.
  3. US Geological Survey, Nonindigenous Aquatic Species: poison dart frog (Dendrobates sp.) profile, checked 30 October 2026.
  4. National Park Service, Gates of the Arctic National Park & Preserve, checked 30 October 2026.
  5. National Park Service, Mississippi National River & Recreation Area, checked 30 October 2026.
  6. National Park Service, Chattahoochee River National Recreation Area, checked 30 October 2026.
  7. US Fish and Wildlife Service, checked 30 October 2026.
  8. U.S. Fish and Wildlife Service, species profile, checked 30 October 2026.
  9. US Geological Survey, Nonindigenous Aquatic Species: clown anemonefish profile, checked 30 October 2026.
  10. NOAA Fisheries, Fishery Bulletin (PDF), checked 30 October 2026.

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