plumaRelated word or term.calamusRelated word or term.
PlumagePlumage (from Latin pluma 'feather'), or feathering, is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with sex and age classes. Within a few species, there can be different colour morphs.
Integumentary systemThe integumentary system is the set of organs forming the outermost layer of an animal's body, comprising the skin, hair, scales, feathers, hooves, claws, and nails. It acts as a protective physical barrier between the external environment and the internal environment. Additionally, it maintains water balance, protects the deeper tissues, excretes waste, regulates body temperature, and contains the sensory receptors that detect pain, sensation, pressure, and temperature.
BirdWarm-blooded animals with wings and feathersBirds are a group of warm-bloodedvertebrateanimals constituting the classAves, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. They live worldwide and range in size from the 5.5 cm (2.2 in) bee hummingbird to the 2.8 m (9 ft 2 in) common ostrich.
PillowA pillow is a soft fabric cushion used to support the head or body. Pillows are a form of bedding that supports the head and neck. Some pillows are purely decorative. In contemporary western culture, pillows are encased in a plain or patterned fabric envelope (known as a pillowcase). Inside is a soft stuffing from synthetic or natural materials. The word pillow comes from Middle English pilwe, from Old English pyle (akin to Old High German pfuliwi) and from Latin pulvinus.
DinosaurDinosaurs are a diverse group of warmblooded reptiles of the cladeDinosauria. They existed through most of the Mesozoicera, first appearing early in the Triassicperiod. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 mya and their dominance continued throughout the Jurassic and Cretaceous periods.
ArchosaurSynonymsAvesuchia Benton, 1999Archosauria or archosaurs () is a clade of diapsidsauropsidtetrapods, with birds and crocodilians being the only known extant representatives. Although broadly classified as reptiles, which traditionally exclude birds, the cladistic sense of the term includes all living and extinct relatives of birds and crocodilians such as non-avian dinosaurs, pterosaurs, phytosaurs, aetosaurs and rauisuchians as well as many Mesozoic marine reptiles.
BeddingBedding, also called bedclothes or bed linen, is the materials laid above the mattress of a bed for hygiene, warmth, protection of the mattress, and decorative effect, i.e. the removable and washable portion of a human sleeping environment. Multiple sets of bedding for each bed are often washed in rotation and/or changed seasonally to improve sleep comfort at varying room temperatures.
VertebrateSubphylum of chordatesVertebrates (), also called craniates, are animals with a vertebral column and a cranium. The vertebral column surrounds and protects the spinal cord, while the cranium protects the brain. The vertebrates make up the subphylumVertebrata ( ) with some 65,000 species, by far the largest ranked grouping in the phylumChordata. The vertebrates include mammals, birds, amphibians, and various classes of fishes and reptiles.
Epidermis (zoology)In zoology, the epidermis is an epithelium (sheet of cells) that covers the body of a eumetazoan (all animals except sponges). Eumetazoa have a cavity lined with a similar epithelium, the gastrodermis, which forms a boundary with the epidermis at the mouth. Sponges have no epithelium, and therefore no epidermis or gastrodermis. The epidermis of a more complex invertebrate is just one layer deep, and may be protected by a non-cellular cuticle.
CrypsisIn ecology, crypsis is the ability of an animal or a plant to avoid observation or detection by other animals. It may be part of a predation strategy or an antipredator adaptation. Methods include camouflage, nocturnality, subterranean lifestyle and mimicry. Crypsis can involve visual, olfactory (with pheromones) or auditory concealment.
HeatType of energy transfer "Heating" redirects here; not to be confused with Home heating or Heat wave. This article is about a type of energy transfer. For the film, see Heat (1995 film). For other uses, see Heat (disambiguation).*As an Amazon Associate I earn from qualifying purchases.