aothoe populi, the poplar hawkmoth, is a moth of the family Sphingidae. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. It is found throughout the Palearctic region and the Near East and is one of the most common members of the family in the region. It is distinctive due to its habit of resting with its hindwings held further forward than (but still half hidden by) the forewings. Adults may be seen from May to September, and do not feed, not having a functional proboscis, and can vary in colour from grey to yellow. The larva is green, feeds on poplar and some other tree species, and pupates below ground. Description Laothoe populi is a large (wingspan 70–100 mm (2.8–3.9 in)), odd-looking species of moth, due to its habit of resting with its hindwings held further forward than (but still half hidden by) the forewings. The species lacks a frenulum joining the wings together, and is said to look like a cluster of dead leaves of the main host, poplar. When disturbed, the moth will suddenly reveal a bright orange-red basal patch on the hindwing, possibly as a distraction or startle display. The wings are grey marked with darker grey fascia but with the greys occasionally replaced by buffish tones, a form more frequent among females than males. There is a white spot at the distal edge of the cell on the forewings. Gynandromorphs, half female and half male, are common. Poplar hawkmoths have been known to produce a hybrid when mated with the eyed hawkmoth, Smerinthus ocellatus; the hybrid has eyes on the hindne or two broods are produced each year and adults can be seen from May to August. The moth lays eggs which are large, spherical, pale green, and glossy. These are laid singly or in pairs on the underside of leaves of the host plant. Females lay around 50 to 200 eggs. On first hatching the larva (or "hornworm") is pale green with small yellow tubercles and a cream-coloured tail horn. Later, it develops yellow diagonal stripes on its sides, and pink spiracles. Individuals feeding on willows may become quite heavily spotted with red. Others are more bluish white with cream stripes and tubercules. They are stout bodied, and grow to 65–85 mm (2.6–3.3 in). The larva has a diet of tree leaves such as poplar, willow and aspen. The species overwinters as a pupa, the larva pupating in an earthen cell 2–3 cm (0.79–1.18 in) below the surface, near its host plant. It has a short cremaster. The poplar hawkmoth lives for a few we