Fig 2. Number of positive trap catch hours as a function of time since sunrise in hourly bins for H. ligniperda and H. ater and for time since sunset for A. ferus.

Because day length varied as a function of the day of the year during the study a range is provided that encompasses the period when sunrise or sunset occurred. Dashed lines indicate the period where sunset occurred as a function of time since sunrise for H. ligniperda and H. ater. Similarly for the nocturnal A. ferus these dashed lines indicate the period when sunrise occurred as a function of time since sunset.