D3374: Seasonal color in Utah odonates: Do odonates change color over the season?

Odonates rely on color signals for mate and species recognition, exhibiting vibrant coloration. While seasonal color changes have been observed in other brightly colored insects like butterflies, this phenomenon, known as seasonal polyphenism, has not been thoroughly studied in Odonata. We propose that if color signals are crucial for odonate visual recognition, their colors may also change as the season progresses due to variations in light intensity and temperature. To investigate this, we will collect a population of odonates (including Anisoptera and Zygoptera) from Bicentennial Park in Provo, Utah, between May and September. Three male specimens of each species will be collected weekly when the temperature exceeds 65ºF from 11 am to 1 pm. These specimens will undergo color measurements using a spectrophotometer to obtain data on various vibrant body parts. The color data will be analyzed in R to identify any seasonal coloration changes. Additionally, weekly light environment data will be collected to compare with potential odonate color changes. Understanding whether odonates exhibit seasonal polyphenism is beneficial as it sheds light on the evolutionary and environmental pressures that impact their survival. By comprehending these factors, we can better protect and conserve odonates for future generations.