tree cricket singing from high in the forest canopy
- Size
- Body: 2–3 cm
- Lifespan
- 1–2 years
- Diet
- Omnivorous: feeds on leaves, flowers, fruit and small insects. Active at night, feeding in canopy of trees and shrubs. Males produce loud, rhythmic calls by rubbing wings together.
- Habitat
- Canopies of native trees and shrubs. The tenants of the high-rise, preferring the leafy suburbs of manuka, kanuka and garden citrus, where they blend into foliage with skill of a professional camoufleur.
- Range
- Throughout North and South Islands in native forests, scrublands and gardens. Most common in warm, lowland areas with diverse trees and shrubs for feeding and shelter.
- Endemism
- Native
- Main Threats
- Habitat loss from forest clearance and urban development. Pesticide use in gardens which kills adults. Light pollution which disrupts mating calls and nocturnal behaviour.
- Population
- While not as famous as the black field cricket, they are arguably more numerous in the vertical gardens of our islands. Heard much more often than seen, providing rhythmic soundtrack to warmer summer nights.
- Conservation Status
- Not Threatened
The unseen percussionist of the New Zealand canopy. An insect that turns summer into music.
Tree crickets have slender, translucent bodies in shades of pale green or straw-yellow that function as high-tech foliage-blend camouflage. Unlike their tank-like ground-dwelling cousins, these nightly orchestrators move with a cautious, high-stepping gait to avoid disturbing the vegetation. A cricket that hides in plain sight.
The males are famous biological thermometers. They produce a high-pitched, rhythmic trill by rubbing their wings together, a frequency that fluctuates precisely with the ambient temperature, effectively turning the summer air into an auditory data stream. The life cycle is a definitive sign of seasonal synchronisation, where survival is dictated by the rhythm of the sun. A cricket that tells the temperature.
Females utilise a slender ovipositor to drill eggs into soft plant stems, where they remain as a secure winter hoard until the warmth of spring triggers their emergence. As primarily herbivorous middle-tier residents, they convert leaf matter into insect biomass, providing a vital protein source for canopy-dwelling birds like fantails and grey warblers.
This existence is a masterclass in orchard integrity, moving energy through the vertical layers of the forest while acting as an opportunistic check on aphid populations. Their presence is a primary indicator of canopy-web complexity, proving that the forest is still very much awake and busy long after the birds have gone to rest.
While currently not threatened, tree crickets are foundational participants in the auditory landscape of New Zealand. The summer night is warm. The cricket sings, high-pitched and rhythmic, a pulse in the dark. The temperature is 22 degrees. The cricket does not know it is a thermometer. It just wants a mate.
The smallest voices in the great forest are often the most persistent.