WingFlight, Animal: The use of wings or wing-like appendages to remain aloft and move through the air.Drosophila Proteins: Proteins that originate from insect species belonging to the genus DROSOPHILA. The proteins from the most intensely studied species of Drosophila, DROSOPHILA MELANOGASTER, are the subject of much interest in the area of MORPHOGENESIS and development.Drosophila: A genus of small, two-winged flies containing approximately 900 described species. These organisms are the most extensively studied of all genera from the standpoint of genetics and cytology.Butterflies: Slender-bodies diurnal insects having large, broad wings often strikingly colored and patterned.Pupa: An inactive stage between the larval and adult stages in the life cycle of insects.Drosophila melanogaster: A species of fruit fly much used in genetics because of the large size of its chromosomes.Wnt1 Protein: A proto-oncogene protein and member of the Wnt family of proteins. It is expressed in the caudal MIDBRAIN and is essential for proper development of the entire mid-/hindbrain region.Genes, Insect: The functional hereditary units of INSECTS.Imaginal Discs: Hollow sacs of cells in LARVA that form adult structures in insects during BIOLOGICAL METAMORPHOSIS.Odonata: An order of insects comprising three suborders: Anisoptera, Zygoptera, and Anisozygoptera. They consist of dragonflies and damselflies.Insect Proteins: Proteins found in any species of insect.Gene Expression Regulation, Developmental: Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action during the developmental stages of an organism.Morphogenesis: The development of anatomical structures to create the form of a single- or multi-cell organism. Morphogenesis provides form changes of a part, parts, or the whole organism.Body Patterning: The processes occurring in early development that direct morphogenesis. They specify the body plan ensuring that cells will proceed to differentiate, grow, and diversify in size and shape at the correct relative positions. Included are axial patterning, segmentation, compartment specification, limb position, organ boundary patterning, blood vessel patterning, etc.Larva: Wormlike or grublike stage, following the egg in the life cycle of insects, worms, and other metamorphosing animals.Biomechanical Phenomena: The properties, processes, and behavior of biological systems under the action of mechanical forces.Pigmentation: Coloration or discoloration of a part by a pigment.Insects: The class Insecta, in the phylum ARTHROPODA, whose members are characterized by division into three parts: head, thorax, and abdomen. They are the dominant group of animals on earth; several hundred thousand different kinds having been described. Three orders, HEMIPTERA; DIPTERA; and SIPHONAPTERA; are of medical interest in that they cause disease in humans and animals. (From Borror et al., An Introduction to the Study of Insects, 4th ed, p1)Receptors, Invertebrate Peptide: Cell surface receptors for invertebrate peptide hormones or neuropeptides.Phenotype: The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment.