A delicacy of the Australian Aborigines — a witchety (or witjuti) grub, a caterpillar of a wood moth (Lepidoptera: Cossidae) that feeds on the roots and stems of witjuti bushes (certain Acacia species).
Frontal view of the head of a worker honey bee, Apis mellifera (Hymenoptera: Apidae), with transverse section of proboscis showing how the “tongue” (fused labial glossae) is enclosed within the sucking tube formed from the maxillary galae and labial palps.
The flash patterns of males of a number of Photinus firefly species (Coleoptera: Lampyridae), each of which generates a distinctive pattern of signals in order to elicit a response from their conspecific females.
Males of the Arctic flyRhamphomyia nigrita (Diptera: Empididae) hunt for prey in swarms of Aedes mosquitoes (lower mid-right of drawing) and carry the prey to a specific visual marker of the swarm site (left of drawing).
A female of the parasitic waspMegarhyssa nortoni (Hymenoptera: Ichneumonidae) probing a pine log with her very long ovipositor in search of a larva of the sirex wood wasp, Sirex noctilio (Hymenoptera: Siricidae).
The life cycle of a hemimetabolous insect, the southern green stink bug or green vegetable bug, Nezara viridula (Hemiptera: Pentatomidae), showing the eggs, nymphs of the five instars, and the adult bug on a tomato plant.
Diagrammatic view of the changing activities of the epidermis during the fourth and fifth larval instars and prepupal (= pharate pupal) development in the tobacco hornworm, Manduca sexta (Lepidoptera: Sphingidae) in relation to the hormonal environment.
Age-specific oviposition rates of three predators of cotton pests, Chrysopa sp. (Neuroptera: Chrysopidae), Micromus tasmaniae (Neuroptera: Hemerobiidae), and Nabis kinbergii (Hemiptera: Nabidae), based on physiological time above respective development thresholds of 10.5°C, —2.9°C, and 11.3°C.
A cladogram showing the relationships of four species, A, B, C, and D, and examples of (a) the three monophyletic groups, (b) two of the four possible (ABC, ABD, ACD, BCD) paraphyletic groups, and (c) one of the four possible (AC, AD, BC, an d BD) polyphyletic groups that could be recognized based on this cladogram.
Underside of the thorax of the beetleHenoticus serratus (Coleoptera: Cryptophagidae) showing the depressions, called mycangia, which the beetle uses to transport fungal material that inoculates new substrate on recently burnt wood.
Worker bees from three eusocial genera, from left, Bombus, Apis, and Trigona (Apidae: Apinae), superficially resemble each other in morphology, but they differ in size and ecology, including their pollination preferences and level of eusociality.
Development of the honey bee, Apis mellifera (Hymenoptera: Apidae), showing the factors that determine differentiation of the queen-laid eggs into drones, workers, and queens (on the left) and the approximate developmental times (in days) and stages for drones, workers, and queens (on the right).
Section through the mound nest of the African fungus-farming termiteMacrotermes natalensis (Isoptera: Termitidae) showing how air circulating in a series of passageways maintains favorable culture conditions for the fungus at the bottom of t he nest (a) and for the termite brood (b).