They interlock, overlap and knit together, making the feather solid and stiff. Among the bird species that molt only once a year, the basic plumage are those feathers they have on them throughout the year.
Whereas, among species that molt twice annually, the basic plumage are in most cases the feathers that are grow after the first complete molt, and is present at the time of the bird's non-breeding season. In a situation where a harmless species has evolved to replicate the warning signal given by a harmful species directed at a common predator , Batesian mimicry occurs. The protruding part of the mouth of several groups of vertebrates, including some cetaceans.
Birds use them not only to eat, but also to groom, kill prey, manipulate objects, in courtship and to feed the young. A Benthic zone is the ecological region that encompasses the bottom most level of any body of water, be it a river, lake or ocean. When used in conjunction with a living organism, it refers to bottom-dwelling. A term of measurement, that gauges the variety of organisms in a region. It is impacted by the turnover of species among habitats. This type of symmetry is exhibited by most animals, and just means that if a line were drawn down the middle of the body, both sides would be equal and symmetrical.
An animal with this kind of vision has eyes that are projected forward, due to which the field of view overlap, enabling the creature to judge depth.
A term of measurement, that gauges the diversity of organisms in a habitat or ecosystem. This measurement can be made based on the number of species or genetic variation that exist within an ecosystem or region. It is a term used to define the study of the geographic distribution of organisms throughout a region over a given period of time. It is carried out with the aim of examining where organisms dwell, and at what populations.
A region that is defined based on its climate and geography, which has ecologically similar communities of plants, animals, and soil organisms. The similarity is based on plant structures such as trees, grasses and shrubs , plant spacing forest, savanna, woodland , leaf types such as needleleaf and broadleaf , and climate.
Bipedalism is a manner of moving on land, where the organism progresses using only its two rear limbs, or legs. The term is the average number of young produced within a specific period of time. It is calculated per individual, and is usually communicated as a function of age. It is an organ used for respiration, and is part of the body system of arachnids, such as spiders and scorpions. The book lung is located inside the ventral abdominal cavity.
It is an activity carried out by cetaceans most commonly dolphins , in which they swim or drift along the crests of waves in the ocean.
A breeding system includes all the different breeding behaviors polygyny, outcrossing, or selective mating of a population, and the methods in which the members of the population adapt to them.
Bristles are long, stiff strands of hair or feathers. In birds, they are situated near the mouth or eyes. Their function may be to assist the bird in eating and give protection to the eyes. A brood parasite is an organism usually a bird which manipulates another individual of the same or different species to raise its offspring. A method usually adopted to do this is to lay eggs in another birds nest.
The method adopted by one organism to make another individual of the same or different species to raise its offspring. In birds, this is done by laying ones eggs in another birds nest. Located on the lower abdomen of birds, it develops by the shedding of feathers in this area, and the consequent thickening of the skin, after which it becomes densely populated with blood vessels. The brood patch is used to incubate the eggs and keep the young warm.
When a clutch of eggs hatch sequentially, if there is inadequate food, brood reduction takes place. This happens when the weakest chick or chicks, being deprived of food either fail to survive out of starvation, or are devoured by their stronger siblings. The practice of birds, where the parent birds continue to provide warmth to their young, during the time when they are unable to maintain their own body temperatures.
This is a behavioral trait, often displayed by members of the finch family. This refers to the male and female of a pair duplicating each others flight call, vocally. A feature common to invertebrates, which helps them blend with their surroundings using its skin colors or patterns. A single point tooth that is shaped and used for piercing and holding on to food. It is located near the front of the jaw, and is prominently seen in carnivores. A hard shell which shields the dorsal side of an animal's body.
A premolar tooth, which is used to efficiently tear and slice meat of prey. This tooth is seen only in the carnivores. It is the maximum population of a particular species, which can be supported for an indefinite period of time in a particular environment. A fleshy outgrowth, without feathers, seen on the neck and face of a bird.
A group of species, which shares similar features, form or behavior and belong to the same social group. A part of the nervous system, made up of inter-neurons, which exercises control over the nervous system. The process of shedding and replacing of feathers of a birds tail, that starts with the replacing of the innermost pair of feathers first and then moves from the center outward. It is a tendency within animals, with localization of neural control and sensory organs located at an end of the body, usually near the head.
Mainly marine mammals belonging to the Cetacea species. Toothed whales and toothless filter feeding whales are among those that belong to this catergory. Adaptations of different sets of characteristics in two similar species, brought about by overlapping territories, resulting in competition. It is the study of evolutionary history of a group of organisms, especially as shown in a family tree.
Slapping of the upper and lower parts of bills together, as a non vocal form of communication, seen especially in birds like storks. Annual cycle of temperature and rainfall for a particular geographical area depicted in a graphical format. A claw in boas and pythons, which is an extremity of the pelvic girdle. It is used by the male snake, while courting. A name given to the invertebrate phylum Coelenterata, the emphasis is given to the stinging characteristic of the phylum, which makes up its basic structure comprising of nettles, which are generally toxic in nature.
An invertebrate belonging to Coelenterata phylum characterized by a single interval cavity used for digestion, excretion and for other survival activities and which has tentacles on the oral end. Hydras, jellyfish, corals and sea anemones belong to this group.
When two or more individuals compete for the same set of available and limited resources, affecting both the parties negatively. A learning method either using a stimulus — response, or a reward - punishment method, in which associations are made.
This is a method used by non-venomous snakes to tightly grip and suffocate their prey, by coiling around the prey. The skeleton of a zoophyte, which can be calcareous or in the formation of horns. For example, the set of parallel vertical grooves which are present on the sides of salamanders and newts.
The development of dark colors on the areas exposed to the sun and light colors on the undercarriage. Flock of birds, not necessarily belonging to the same species that flock together for protection. A habitat which is critical for the survival and conservation of a species, designated by a rule published in the Federal Register. Reptile belonging to the order crocodylia, which inhabits tropical regions. Crocodiles differ from alligators.
The plumage of a bird attained after the shedding of all previous feathers that do not change significantly in color or pattern, as long as the bird lives. A common phenomenon seen in male birds where the definitive plumage is delayed due to a number of factors. The act of removing an animal specie from the list of endangered, threatened and vulnerable wildlife list.
A group of marine mammals that belong to the family Delphinidae and the Order Cetacea, like dolphins and their relatives. The development of morphological and physiological qualities of an organism in response to prolonged or changing environmental conditions. A period of inactive hormonal development as a response to unfavorable environmental conditions.
This is a temporary phase. Evolution of a species depending upon the evolution of some other species, which itself may be evolving depending on some other factors. Coevolution is basically, the evolution of groups depending on each other together, in order to survive.
The occurrence or existence of two forms within the same species bearing distinct structure, features, coloration, etc. A developed reflexive response to diving, found in most aquatic mammals and birds that are characterized by complex physiological changes and adaptations. At the most basic level, evolution is change that takes place over time. In reference to lifeforms, evolution is the genetic changes observed amongst the population of organisms from generation to generation.
It refers to the situation where closely related sometimes virtually indistinguishable species live in the same territory, but slight differences in their niche causes them to reproduce in isolation of the others.
It refers to the progression in which a species expands its living habitat as well as the resources it utilizes into areas that have a lower density of species in terms of diversity. It is the study of the relation between an individual's ecological role and its form and structural adaptations. This is a method of resource management that acknowledges that the different components of an ecosystem structure, function, and species composition are interlinked, and this factor must be taken into consideration while restoring and protecting the ecosystem's natural balance.
An organism, such as a tick, that latches itself to the surface of its host, in order to survive. Refers to an organism's ability to maintain its body temperature by availing heat from the environment, either by absorbing radiation or through conduction. The average size of a population expressed in terms of individuals assumed to contribute genes equally to the next generation; generally smaller than the actual size of the population, depending on the variation in the reproductive success among individuals.
When a bird lays its eggs in the nest of another, with the purpose of making the host bird to hatch and raise its young. An animal or plant that is in its first stage of development and is usually still contained within the seed, egg, or uterus.
The entire population of organisms plant or animal that face extinction due to a steady reduction of their numbers. This may be the outcome of environmental changes, loss of habitat or predation. This type of organism or parasite such as tapeworm exists and feeds inside the bloodstream or tissue of its host.
The ability of an organism to constantly maintain its body temperature, usually keeping itself warm, irrespective of the external conditions. Similar to hibernation, it is a period of inactivity that the animal goes into during a dry hot season. The phenomenon when light is shone into the eye of certain animals and birds, the pupil seems to glow.
This effect is created by the the layer of tissue called tapetum lucidum that lies immediately behind the retina. Some birds, such as the Eurasian coot, have a hard plate on their forehead called a facial shield, which serve as a display ornament.
Refers to those birds that need to land while migrating, in areas they would not normally inhabit, due to harsh weather. It is a term of classification of living things, in which this group falls below an order. It is further divided into one or more genera. The ranks start with life, followed by domain, kingdom, phylum, class, order, family, genus and species. Fangs are long, pointed teeth located in the front of the mouth.
In mammals, these fangs are called canine teeth and are used for tearing flesh. In snakes, they are used to inject venom into the victim. Indigestible waste products expelled from an organisms digestive tract. Usually referred to as stool. In a general sense, it refers to an organisms ability to reproduce. In biology, it refers to a females potential capacity to reproduce, based on the number of gametes eggs , seed set or asexual propagules. In vertebrates having four limbs the femur is the upper bone of the hind limb.
In insects, it is the third segment in the leg. It is a term used to refer to an animal that has been domesticated, but has escaped and returned to being wild, while still living in its current environment.
Cats, Goats and pigs are examples of such animals. A fetus is a developing organism, which has moved beyond the embryonic stage, but is yet to be born. Organisms that feed by sieving water for food particles, with the help of special filtering structures in their mouths. Clams, sponges, krill and baleen whales use this method. It is that stage in a young bird's life, when the feathers and wing muscles are developed and the bird is capable of flight.
Alternately, it is also used to describe the act of raising chicks to a fully grown state by the parents. Describes the stiff, large feathers of the tail and wings of a bird that are essential for flight.
The food chain is the transfer of life giving energy from one organism to another, which is compatible to receive the same form of energy that was passed on, when the organism perished. In terms of describing the genetic outcome of a new population being established by a very small number of individuals, from a larger population. The founder effect refers to the loss of genetic variation.
The relationship between prey and predator, or deviation in the rate of exploitation of prey by an individual predator due to change in prey density. This term refers to the measure of biodiversity, which means the total species richness within an area. The respiratory organ of any aquatic animal. Its basic function is to help the animal breathe the oxygen dissolved in water. Cartilaginous arches located on each side of the pharynx to provide support to the gills of aquatic as well amphibian animals.
A narrow external opening connected with the pharynx, to allow passage of water, which helps in cleaning the gills. A small patch on the throat of an organism which is distinguished by its color, texture and thickness quality. A cooling mechanism adopted by birds, in which they flap their flap membranes rapidly in the throat to increase evaporation. A bare sac or pouch that can be expanded to accommodate a large prey, or for the show off during courtship display.
Part of the wildlife conservation rehabilitation program, where the animals or birds released in the wild for the first time, are periodically provided with food until they become independent.
An organ located on each side of the head, below a line from the eye to the nostril of some snakes, especially the vipers. It helps the snake detect their prey. Organism that have, as well as are capable of reproducing using both male and female reproductive organs.
To withdraw in a state of seclusion in a dormant condition. Most animals like the bear, prefer the winters to go in hibernation. The study of tissues of organisms. It includes its structure, arrangement, functions, make up, etc. A single specimen used as standard type to name, describe and illustrate, and represent a set of species and subspecies. The process of maintaining internal stability of the physiological system of animals, in course of varying external conditions.
Fine organic substance, composed of partial or full decomposed animal or plant matter, and found in soil. A young animal or bird, capable of feeding itself, but has yet not reached the stage of sexual maturity.
It is a process of phase sensitive learning, where the young animals follow the first moving thing they see. The featherless patch developed on the abdomen of certain brooding birds, that becomes thick due to high levels of vascularity.
This patch comes under direct contact with the eggs during incubation period. Prevention of breeding between species due to behavior, morphology, genetics or a geographical barrier.
Refers to the first covering of feathers on a bird, after it loses its down under surface feathers. This term refers to a young bird in the stage when it has fledged, or young ones of the animals that have not yet reached its adult form, size and sexual maturity.
A hard insoluble protein substance found in hair, nails of mammals, scales of reptiles and bird feathers. This substance is responsible for the structure of hair, nails, scales, etc. This term refers to the most recent known and shared common ancestor between two species, as well as individuals.
The courtship display for mating of certain animals, where males gather around the females for being selected for copulation. The airfoil see airfoil that controls the movement of the birds when in flight, as well as the force with which the birds fly is termed as lift.
A nest like structure built by few birds that can float on water. These birds keep their young ones in them to keep them out of water and afloat. A condition characterized by a high level of concentration of melanin black pigmentation occurring in the coat, skin or plumage of the animals. Transmission of hereditary traits from parent organisms to their offsprings, the trait mainly emphasizes on a single locus.
Mammalia is a group of animals known as the vertebrates have backbones and belong to the Class Mammalia. Single or paired set of feathers located on the mid-back of a bird, or an outgrowth that lines the inner surface of the valves of the shell. The sexual stage in the life cycle of a coelenterate, such as a jellyfish or a hydra, in which it is free-swimming.
It is the process of nuclear division in a cell, in which the total number of chromosomes is reduced to half. Meiosis results in the formation of gametes in animals and spores in other organisms. Before the process begins the DNA in the original cell are replicated during a phase called S-phase and this is similar to that in mitosis. Once the replication is completed, two cell divisions separate the replicated chromosomes into four haploid gametes or spores.
It is the process of marked change in the appearance and habits of some animals, as part of their normal development. Metamorphosis of a caterpillar into a butterfly is one such example.
The annual movement pattern of animals and birds between their breeding grounds and hibernating sites. The phenomenon of traveling beyond the normal distance in migratory birds as well as animals, while being on correct migration travel route.
During migration, birds tend to reverse the orientation of their migratory route in opposite mirror like image directions. Molt migration involves movement of birds from their breeding ground to a temporary location where they shed their feathers, plumage, skin, etc. Molt is a process where birds and animals shed their hair, plumage, feathers, skin, horns, etc, to facilitate the growth of new ones.
An appendage found close to the mouth of some animals, birds and insects, which they use for all eating functions. Whales of the suborder Mysticeti, like Right whales, finback, gray whale, humpback whales, rorquals, etc. This refers to tiny hairlike structures in coelenterates which is used by them to eject stingers.
Is an adjective that means "necessary" when used in biology. Also, exhibited by all members of a species without exception. Used while referring to any whale of the suborder Odontoceti, such as killer whales, dolphins and sperm whales.
They are characterized by a single blowhole, an asymmetrical skull and rows of teeth. They feed primarily on squid, fish and crustaceans. Members of the suborder Oscines, of the order Passeriformes. They comprise songbirds that have highly developed vocal organs. Are a taxonomic group of fish that includes the lobe-finned fish Sarcopterygii and ray-finned fish Actinopterygii.
They are also referred to as bony fish. The calcified portion of an invertebrate's shell. While the organism is living, the ostracum is covered by layers of protein forming a periostracum.
A thin membrane that extends between the body and the limb to form wings. It is basically the extensible fold of skin found in certain insects, reptiles and birds. A mass of regurgitate indigestible matter like fur, feathers and bones of certain predatory birds like the hawk, owl, etc. The balanced distribution of duplicate body parts or shapes sensory and feeding structures in a five fold circular pattern, i.
The external, outermost covering of the shell of some mollusks. It helps to protect the slender slimy inner portions as well as provide the shell with color. A developed third eye in certain cold-blooded vertebrates which helps to regulate body temperature and register light intensity. It refers to the gland found on the back, at the base of the tail in most birds. This gland secretes oil that the birds use for preening which is part of its feather care activities.
Evolution of multiple species from a single ancestry, but these species have morphological differences, however, they coexist in the same habitat or spread to different habitats or they have a change of ecological role.
A specie of an organism found in very small numbers and hence, visible with lot a of effort only for a short duration. Shed skin, which is often seen on tail of a rattlesnake, used to make a rattling sound in order to deter predators. Flight feather of a bird used to control direction during flying, their function is similar to that of the rectrices to a certain extent. Reptiles or vertebrates, who possess a dry scaly skin and reproduce amniotic eggs.
Snakes, lizards and alligators belong to this category. A phenomena where the migrating organism migrates in the opposite direction, normal to other migrating species. A species of dolphins, which dwell in major rivers like the Amazon in Brazil, Yangste in China and the Ganges in India. An anatomical structure, present in a species in the form of a snout, which projects out from the head of the animal. Action of a snake curving its body in concentric curves and rasping its keeled scales together to make a sawing sound as a warning.
A thin plate that forms the covering of certain animals. This covering can either be hard or soft depending upon the morphology of the organism. Unlike normal nest, a shallow depression is made by some ground birds as a nest.
This nest has no soft lining. Organism that are nonmigratory in nature, which means they move about little or not at all from their habitats. This term refers to hatchlings that are capable of leaving the nest but are dependent on their parents for their feed. Semiplumes are a type of feathers that are found under the contour feather on a bird's body. They are responsible for providing insulation as well as some flexibility to the bird.
A vertical rise out of the water or tall grasses performed by certain cetaceans or land mammals respectively. An individual animal that has been left alone or has parted ways with others of its flock during movement or migration. A third set of feathers found in birds that have three different plumages in their annual cycle of molts. Coniferous evergreen forests found in the south of the tundra and north temperate region, characterized by harsh winters.
Definition of zoology 1: See zoology defined for English-language learners See zoology defined for kids. Our keepers are well educated in zoology , biology and other zoo sciences. Meet the guy who will help make it happen. Idaho Statesman," 13 May Ginsburg was there in when the House Un-American Activities Committee grilled zoology professor Marcus Singer about his participation in a communist study group while teaching at Harvard. Filmmaker Cooke, who has a background in zoology , sifts through some of the most egregious myths about the animal kingdom and sets the record straight.
Despite social convention, Edinger went on to study at the University of Heidelberg and Munich and later earn a doctoral degree in geology, zoology and psychology from Frankfurt University in Qualified applicants should have a college degree in zoology , at least five years of experience working with exotic birds, and wide knowledge of biology and avian science.
Besides having an obvious love for the majestic pink bird, candidates must also have a degree in zoology or a related field, at least five years' experience caring for exotic birds, and knowledge of all things flamingo-related. Other Zoology Terms altruism , integument. Definition of zoology for English Language Learners. Learn More about zoology See words that rhyme with zoology Spanish Central: Seen and Heard What made you want to look up zoology? Need even more definitions?
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A Dictionary of Zoology Complemented with numerous illustrations, it includes terms from the areas of ecology, animal behaviour, evolution, earth history, zoogeography, genetics, and physiology and it provides full taxonomic coverage of arthropods, other invertebrates, fish, reptiles, amphibians, birds, and . This glossary defines terms that you might encounter when studying zoology. The term binocular refers to a type of vision that arises from the ability of an animal to view an object with both eyes at the same time. Since the view from each eye is slightly different (due to the eyes being positioned.
If you're fascinated by monkey business or just love horsing around, you might consider a career in zoology — the scientific study of animals. The term is often used instead of endodermis since cnidarians only have two tissue layers instead of three. genus -- n. A category in the classification of plants .