Modest sphinx

Since modest sphinx caterpillars and adults are likely to have specific host plants or nectar sources, it is recommended to check resources on their feeding habits. Adults may be attracted to bright flowers with ample nectar.

To locate the larvae of modest sphinx, one should search among deciduous trees, as they tend to feed on the leaves of species such as cottonwood and willow. Meanwhile, the quest for pupae requires digging around the base of these trees, as they burrow into the ground to undergo pupation. In contrast, adult modest sphinx, being nocturnal, are often found near sources of nectar like garden flowers or forest edges with flowering plants during the night. When searching for any of these life stages, it's best to check the corresponding habitats during their active periods for a successful observation.

For finding modest sphinx larvae, late spring to summer could be suitable as this is when most caterpillars are active and feeding. Adults are often seen from late spring through fall, depending on the region and life cycle timing.

Clear, warm, and calm days are typically best for locating modest sphinx, as cold, windy, or rainy weather can make them less active and harder to spot.