What cicadas are emerging nearby
New cicadas appear when periodical broods emerge in sync with soil temperatures or shortly after annual species hatch in summer. When you see or hear new cicadas, you are usually witnessing either a scheduled mass emergence of periodical cicadas on a multi-year schedule or the steady hatch of annual cicadas that spend years underground and mature in weeks. This guide explains how to tell which cicadas are new in your area, how their life cycles work, and what their presence means for trees, pets, and outdoor plans.
Periodical vs annual cicadas
Periodical cicadas are grouped into broods that emerge in specific years across many states, often in 13- or 17-year cycles, producing loud, synchronous choruses over weeks. Annual cicadas, sometimes called dog-day cicadas, emerge over a longer summer window each year and are usually less numerous and noisy. Broods are tracked by researchers to predict when and where new periodical cicadas will appear, whereas annual cicadas follow local soil and climate cues.
Key emergence triggers
- Soil temperature at around 8 inches depth reaching about 64°F (18°C) for periodical cicadas
- Consistent warm temperatures and adequate soil moisture
- Tree root signals and seasonal day length patterns
How to identify new cicadas
Adult periodical cicadas are typically black with orange wing veins and red eyes, around 1 to 1.5 inches long, while annual cicadas are larger, greener or brownish, and often have more mottled patterns. Nymphs emerge from the ground, climb vertical surfaces, and shed their skins, leaving hollow shells called exuviae on trees and outdoor structures. Listening for species-specific songs and checking local emergence maps can help confirm which cicadas are new in your area.
Quick visual comparison
| Feature | Periodical cicadas | Annual cicadas |
|---|---|---|
| Body size | About 1–1.5 in (2.5–3.8 cm) | About 1–2 in (2.5–5 cm) |
| Coloration | Black body, orange wing veins, red eyes | Green or brown, clearer wing veins, variable eye color |
| Life cycle length | 13 or 17 years (periodical broods) | 2–5+ years (annual species) |
| Emergence pattern | Massive, synchronized over wide areas | Staggered, smaller numbers over seasons |
| Sound | Loud, pulsing mating calls | More varied, often quieter songs |
What a new cicada emergence means for trees
Most healthy trees withstand cicada egg-laying and nymph feeding with minimal long-term harm, though young or stressed trees can experience more damage. Female cicadas cut slits in small branches to lay eggs, which may cause browning or death of those twigs, a symptom occasionally called flagging. Nymphs tunnel in soil and feed on root fluids, but large populations primarily affect tree vigor when soil densities are high or trees are already compromised.
Protective steps for vulnerable trees
- Delay major pruning or new plantings until after emergence finishes
- Use lightweight mesh row covers on small ornamentals during egg-laying season
- Water young trees during dry periods to reduce stress
- Monitor for heavy flagging and evaluate treatment only if repeated years are affected
Timing and planning around cicada activity
Cicada appearances are brief but intense, typically lasting a few weeks for peak singing and mating, with nymph activity extending over longer periods underground. Knowing the expected emergence windows for your region helps you schedule outdoor events, manage landscaping work, and reduce unnecessary treatments. Local extension services and cicada tracking projects often provide up-to-date maps that clarify when new cicadas are likely in your neighborhood.
Practical calendar guidance
| Period | Event | Why it matters |
|---|---|---|
| 4–8 weeks before emergence | Soil warming and moisture stabilize | Triggers nymph movement toward the surface |
| When soil reaches ~64°F and warm fronts occur | Nymphs climb and molt into adults | Synchronized emergence begins, more visible activity |
| Peak adult activity (1–3 weeks) | Singing, mating, and egg-laying | Heaviest noise and branch flagging |
| 2–4 weeks after peak | Adults die off, nymphs return underground | Activity declines, nymphs feed on roots over multiple years |
Frequently asked questions about new cicadas
People commonly ask whether cicadas bite, sting, or carry diseases, and how loud their songs can become. Cicadas do not bite or sting humans, they are not venomous, and they rarely spread disease. Song volume can reach roughly 80–100 decibels in areas with heavy concentrations, similar to a motorcycle or lawn equipment, but brief exposure poses minimal risk to hearing. Understanding these facts reduces unnecessary concern and supports sensible planning in areas where new cicadas are emerging.
How to stay informed about new cicada activity
Tracking new cicadas is easiest when you combine local observations with established brood maps and extension resources. Community science projects, university dashboards, and municipal alerts can notify you when periodical broods are expected to emerge or when annual populations spike. If you are planning events or managing landscapes, aligning your schedule with these trusted sources reduces surprises and improves long-term preparedness.
Takeaway summary
New cicadas signal regular parts of many regional ecosystems, bringing predictable sounds and brief but noticeable activity each season or multi-year cycle. By learning how to identify species, understanding timing cues, and protecting sensitive young trees, you can coexist with cicada emergence with minimal disruption. Use local maps, extension guidance, and simple preventative steps to plan confidently around these recurring natural events.