Are Apache Cicadas Attracted to Artificial Lights?

Cicadas are fascinating insects renowned for their distinctive sound and unique life cycles. Among the many species, Apache cicadas (genus Diceroprocta) are native to the southwestern United States and northern Mexico, thriving in arid and semi-arid environments. One intriguing question that often arises about these insects is whether Apache cicadas, like many other nocturnal or crepuscular insects, are attracted to artificial lights.

This article explores the behavior of Apache cicadas relative to artificial lighting, shedding light on their natural habits, sensory biology, and interactions with human environments.

Understanding Apache Cicadas

Before delving into their relationship with artificial light, it’s important to understand more about Apache cicadas themselves.

Habitat and Behavior

Apache cicadas are typically found in desert and scrubland regions where they spend most of their life underground as nymphs feeding on root sap. After several years (usually 2-5 years), they emerge as adults during the summer months. Adult cicadas are diurnal , active mainly during the day , and are known for their loud mating calls produced by males to attract females.

Unlike some other cicada species that emerge synchronously in large numbers, Apache cicadas tend to have staggered emergences. This helps them avoid predators and adapt to the harsh climatic conditions of their environment.

Sensory Biology

Cicadas have compound eyes adapted for daylight vision, as well as simple eyes (ocelli) that help detect changes in light intensity. Their primary sensory adaptations focus on detecting mates via sound rather than responding to light cues for navigation or feeding.

Are Apache Cicadas Nocturnal?

A key factor in understanding whether Apache cicadas are attracted to artificial lights is whether they are nocturnal or crepuscular (active during dawn or dusk).

Unlike many moths, beetles, and other insects that fly at night or twilight and use moonlight or stars for navigation, Apache cicadas are primarily diurnal. They actively sing, feed, and mate during daylight hours when visibility is high, and temperatures are suitable.

While some cicada species may occasionally be seen around lights after dark, this behavior is rare and usually incidental rather than indicative of a natural attraction.

Why Are Some Insects Attracted to Artificial Lights?

To grasp why Apache cicadas might or might not be attracted to lights, it’s helpful to understand why many nocturnal insects exhibit phototaxis (movement toward light).

Positive Phototaxis

Many nocturnal insects use natural light sources like the moon or stars for navigation. Because these celestial lights remain at a fixed point in the sky relative to the horizon, insects can maintain a steady flight path by keeping the light source at a constant angle.

Artificial lights disorient these insects because they are much closer and brighter than natural lights. The small angle changes when circling an artificial lamp cause them to spiral inward toward the source. This phenomenon is known as positive phototaxis.

Negative Effects of Light Attraction

The attraction to artificial light can be detrimental:

• Increased predation risk around lit areas
• Disruption of natural behaviors like mating and feeding
• Energy depletion from continuous circling around lights
• Reduced reproductive success and population impacts

Do Apache Cicadas Exhibit Phototaxis?

Given that Apache cicadas are diurnal and rely primarily on sound rather than sight for mating cues, it is unlikely that they exhibit strong phototactic behavior.

Field Observations

Most field observations report that Apache cicadas remain active only during daytime hours and seek shelter at night. They do not typically swarm around porch lights or street lamps like moths do.

In fact, after sunset, Apache cicadas generally become inactive or hide under leaves or bark until the next morning. This behavior greatly reduces their encounters with artificial lighting.

Scientific Studies

While detailed studies specifically testing phototaxis in Apache cicadas are scarce, research on related species supports the conclusion that:

• Cicadas do not rely heavily on light cues for navigation.
• Their activity ceases at night when artificial lights operate.
• They do not show significant attraction behavior toward artificial light sources.

Can Artificial Light Impact Apache Cicada Behavior?

Even if Apache cicadas are not directly attracted to lights, artificial lighting can still influence their behavior indirectly:

Altered Predator Dynamics

Artificial lighting may attract predators such as bats and birds that feed on cicadas. If predators concentrate near lit areas where prey congregate (even if limited), this could increase predation pressure on local cicada populations.

Habitat Disturbance

Increased urbanization and lighting can disrupt the microhabitats where nymphs develop underground or adults rest during inactive periods. Changes in temperature regimes caused by streetlights could affect emergence timing or adult survival rates.

Noise-Light Interaction

Because male Apache cicadas use loud calls rather than visual signals for mating communication, artificial light might have less influence on mating success compared to noise pollution. However, excessive lighting combined with other urban disturbances could still fragment populations over time.

Practical Implications for Residents in Cicada Areas

If you live in an area populated by Apache cicadas or similar species and want to minimize potential impacts from outdoor lighting, consider these tips:

• Use warm-colored LED bulbs with low UV emissions since insects tend to be less attracted to warmer wavelengths.
• Install motion-sensor lights instead of always-on lamps to reduce continuous illumination.
• Shield outdoor fixtures so light is directed downward rather than outward into trees or vegetation.
• Limit nighttime lighting during peak emergence periods if possible.
• Maintain vegetated areas and natural habitat buffers away from overly bright spaces.

Conclusion

Apache cicadas are primarily diurnal insects whose life strategies revolve around daytime activity, acoustic communication, and adaptation to arid environments. Unlike many nocturnal insects such as moths or beetles that exhibit strong positive phototaxis toward artificial lights, Apache cicadas do not appear naturally drawn toward artificial lighting sources.

Although direct attraction is minimal or absent, artificial lighting can still impact their ecology in subtle ways, altering predator-prey relationships or disturbing microhabitats, especially as human development expands across their native ranges.

For those interested in supporting healthy cicada populations or simply curious about these remarkable insects, understanding their behavior relative to artificial lighting helps promote coexistence while minimizing environmental disruptions.

By appreciating how different species respond uniquely to human activities such as outdoor lighting, we can tailor conservation efforts that respect both nature’s complexity and our modern lifestyles.