Amblycorypha
Stål, 1873
Round-headed Katydids, False Katydids, Bush-crickets
Amblycorypha is a of North round-headed in the , containing approximately 14 described . These are renowned for their exceptional leaf-, with closely matching the patterns of leaves. They are known for their , with males producing songs via to attract females. Some species reach prodigious sizes in tropical regions, and males provide to females during mating.
Pronunciation
How to pronounce Amblycorypha: //ˌæmblɪˈkɔːrɪfə//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from other by the rounded shape and the specific pattern of that closely mimics leaf . The oblong-winged katydid (Amblycorypha oblongifolia) is a widespread representative . Species within the genus can be difficult to distinguish and may require examination of male calling songs or . The 'round-headed katydid' refers to the characteristic head profile.
Images
Habitat
Found in diverse ranging from tropical rainforests of Central America to temperate landscapes of North America. Occurs in vegetation from Texas to Vermont in the United States. Inhabits areas with abundant leafy vegetation that provides both food and .
Distribution
North America (United States from Texas to Vermont, and throughout eastern and central regions) and Central America (tropical rainforests of Rica and likely other countries). Distribution records include Alabama, Arizona, Arkansas, Colorado, and Connecticut.
Diet
Herbivorous; feeds on material including leaves.
Behavior
activity pattern, becoming more visible at night. Males produce -specific calling songs through (scraping a on one against a on the other). Females detect these songs via on their forelegs. Males provide () to females during mating—-rich food packets that accompany sperm. Larger males with louder songs typically provide larger nuptial gifts.
Ecological Role
in forest and meadow . Serves as for birds, reptiles, and other . Subject to by digger (Sphex ichneumoneus), which paralyze to provision nests for their .
Human Relevance
Subject of ecological and behavioral research, particularly regarding and mating systems. Some are common enough to be familiar components of summer soundscapes in eastern North America.
Similar Taxa
- Scudderia (bush katydids)Similar body form and , but Scudderia have more pointed and different patterns
- Neoconocephalus (conehead katydids)Larger, more with cone-shaped ; different and song characteristics
- Conocephalus (meadow katydids)Generally smaller, more slender with different shapes and preferences
More Details
Acoustic Communication
The hearing organs () on the forelegs contain a hornlike chamber that amplifies sound, with a functioning analogously to a human eardrum. This sophisticated auditory system allows females to evaluate male song quality.
Sexual Selection
Research has demonstrated that female prefer larger males with louder songs, as these males provide larger (). This -rich gift enables females to produce more or larger , creating direct benefits for mate choice.
Predator Avoidance
The remarkable leaf extends beyond color to include the precise replication of leaf patterns, making these exceptionally difficult to detect when at rest on vegetation.