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Identification:
The coqui is a small tree frog slightly larger than 2.5 cm (1 in) long. Round body shape. Coloration is variable from light yellow to dark brown. Broad rounded snout with obvious toe pads. Distinctive "ko-kee" vocalization. Found on ground level and in trees and bushes, but calls primarily from 1-2m (3-7 feet). Listen to the distinctive coqui call:
Impacts: Coqui have no natural predators in Hawai‘i and can reach population densities of up to 10,000 frogs per acre. They have a voracious appetite and feed on a large amount of insects, including native insects, possibly indirectly affecting food supplies for native insect-eating birds. Home sellers must disclose that coqui are in the area.
Dispersal Mechanism: Coqui frogs do not travel very far on their own, but when given the chance to hop on a nursery plant, flowers, or vehicle, they can quickly spread. Most coqui arrive on new islands through infested nursery plants and flowers. Intra-island, coqui travel by the movement of plants by humans and may hitch a ride on vehicles. The coqui frog is currently widepread on the island of Hawaii, but is only known to be in a few locations on the island of Maui, Kauai, and Oahu. They are not present on Molokai or Lanai. If you see them anywhere else on Maui, Molokai, Lanai, Oahu or Kauai- let someone know!
More information about this pest 
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Greenhouse frog (Eleutherodactylus planirostris):
The greenhouse frog is widespread throughout Hawaii. This small tree frog is usually slightly smaller than 2.5 cm (1 in). Usually copper colored with WARTY TEXTURED SKIN. Narrower snout and less distinct toepads than the coqui frog. CRICKET-LIKE VOCALIZATION. Found only on the ground. Listen to the greenhouse frog call:
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Greenhouse frog (Eluetherodactylus planirostris) has a narrower snout and less pronounced toe pads than the coqui frog. Image courtesy A. Hara, UH CTAHR.
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