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Regal Moth
''Citheronia regalis'', the regal moth or royal walnut moth, is a North American moth in the family Saturniidae. The caterpillars are called hickory horned devils. The adult (imago) has a wingspan of . The species was first described by Johan Christian Fabricius in 1793. Life cycle The adult moth is the largest moth by mass in latitudes north of Mexico, as are the spectacular larva and the substantial pupa. The life cycle of the moth is typical of the Saturniidae species, and typical of the Ceratocampinae. It burrows into the ground to pupate in an earthen chamber, rather than spinning a cocoon. Its eggs are yellowish, ovular and 2 mm in diameter. They are laid either singly or in groups of up to four on the upper surface of the host plant leaves, favoring nut trees such as ''Juglans'' and ''Carya'' (walnuts and hickories). There are regional preferences, with the utilization of sweet gum and persimmon in the south, and sumacs where the others are not available. Larvae are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johan Christian Fabricius
Johann Christian Fabricius (7 January 1745 – 3 March 1808) was a Danish zoologist, specialising in "Insecta", which at that time included all arthropods: insects, arachnids, crustaceans and others. He was a student of Carl Linnaeus, and is considered one of the most important entomologists of the 18th century, having named nearly 10,000 species of animals, and established the basis for the modern insect classification. Biography Johann Christian Fabricius was born on 7 January 1745 at Tønder in the Duchy of Schleswig, where his father was a doctor. He studied at the gymnasium at Altona and entered the University of Copenhagen in 1762. Later the same year he travelled together with his friend and relative Johan Zoëga to Uppsala, where he studied under Carl Linnaeus for two years. On his return, he started work on his , which was finally published in 1775. Throughout this time, he remained dependent on subsidies from his father, who worked as a consultant at Frederiks H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diospyros Virginiana
''Diospyros virginiana'' is a persimmon species commonly called the American persimmon, common persimmon, eastern persimmon, simmon, possumwood, possum apples, or sugar plum. It ranges from southern Connecticut to Florida, and west to Texas, Louisiana, Oklahoma, Kansas, and Iowa. The tree grows in the wild but has been cultivated for its fruit and wood since prehistoric times by Native Americans. ''Diospyros virginiana'' grows to , in well-drained soil. The tree is typically dioecious, so one must have both male and female plants to obtain fruit. Most cultivars are parthenocarpic (setting seedless fruit without pollination). The fragrant flowers are pollinated by insects and wind. Fruiting typically begins when the tree is about 6 years old. The fruit is round or oval and usually orange-yellow, sometimes bluish, and from in diameter. Both the tree and the fruit are referred to as persimmons, with the latter appearing in desserts and cuisine in the U.S. South and Midwest. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic Northeast
The Atlantic Northeast () is a geographic and cultural region of eastern North America bounded by the Atlantic Ocean to the east and (loosely) by the Saint Lawrence River to the northwest. Though no official boundary exists, the most common conception includes the Maritime provinces, southern Quebec, and the island of Newfoundland in Canada, and the New England region of the United States. Broader conceptions reach further north into Canada, including Labrador and the Côte-Nord region of Quebec. Narrower conceptions may be limited to the coastal areas east of the Appalachian Mountains. The variety of definitions can be attributed to overlapping commonalities of the region's history, culture, geography, ecology, society, and other factors. Definition The term "Atlantic Northeast" should not be confused with Atlantic Canada, which includes the entirety of New Brunswick, Newfoundland and Labrador, Nova Scotia, and Prince Edward Island, but excludes Quebec. It should also not be con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New England
New England is a region consisting of six states in the Northeastern United States: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. It is bordered by the state of New York (state), New York to the west and by the Canadian provinces of New Brunswick to the northeast and Quebec to the north. The Gulf of Maine and Atlantic Ocean are to the east and southeast, and Long Island Sound is to the southwest. Boston is New England's largest city and the capital of Massachusetts. Greater Boston, comprising the Boston–Worcester–Providence Combined Statistical Area, houses more than half of New England's population; this area includes Worcester, Massachusetts, the second-largest city in New England; Manchester, New Hampshire, the largest city in New Hampshire; and Providence, Rhode Island, the capital of and largest city in Rhode Island. In 1620, the Pilgrims (Plymouth Colony), Pilgrims established Plymouth Colony, the second successful settlement in Briti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deep South
The Deep South or the Lower South is a cultural and geographic subregion of the Southern United States. The term is used to describe the states which were most economically dependent on Plantation complexes in the Southern United States, plantations and Slavery in the United States, slavery, generally Louisiana, Mississippi, Alabama, Georgia (U.S. state), Georgia, and South Carolina. East Texas, North Florida, the Arkansas Delta, South Arkansas, West Tennessee, and the southern part of North Carolina are sometimes included as well. Following the end of the American Civil War in 1865, the region experienced significant economic hardship and became a focal point of racial tension during and after the Reconstruction era. Before 1945, the Deep South was often referred to as the "Cotton States" since cotton was the primary cash crop for economic production. The civil rights movement in the 1950s and 1960s helped usher in a new era, sometimes referred to as the New South. The Deep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Normal Distribution
In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable. The general form of its probability density function is f(x) = \frac e^\,. The parameter is the mean or expectation of the distribution (and also its median and mode), while the parameter \sigma^2 is the variance. The standard deviation of the distribution is (sigma). A random variable with a Gaussian distribution is said to be normally distributed, and is called a normal deviate. Normal distributions are important in statistics and are often used in the natural and social sciences to represent real-valued random variables whose distributions are not known. Their importance is partly due to the central limit theorem. It states that, under some conditions, the average of many samples (observations) of a random variable with finite mean and variance is itself a random variable—whose distribution c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vestigial Structure
Vestigiality is the retention, during the process of evolution, of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. Assessment of the vestigiality must generally rely on comparison with homology (biology), homologous features in related species. The emergence of vestigiality occurs by normal evolutionary processes, typically by loss of function of a feature that is no longer subject to Directional selection, positive Evolutionary pressure, selection pressures when it loses its value in a changing environment. The feature may be Negative selection (natural selection), selected against more urgently when its function becomes definitively harmful, but if the lack of the feature provides no advantage, and its presence provides no disadvantage, the feature may not be phased out by natural selection and persist across species. Examples of vestigial structures (also called degenerate, atrophied, or rudimentary orga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egg (biology)
An egg is an organic vessel grown by an animal to carry a possibly fertilization, fertilized egg cell (a zygote) and to egg incubation, incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the animal hatches. Most arthropods, vertebrates (excluding live-bearing mammals), and Mollusca, mollusks lay eggs, although some, such as scorpions, do not. Reptile eggs, bird eggs, and monotreme eggs are laid out of water and are surrounded by a protective eggshell, shell, either flexible or inflexible. Eggs laid on land or in nests are usually kept within a warm and favorable temperature range while the embryo grows. When the embryo is adequately developed it hatches, i.e., breaks out of the egg's shell. Some embryos have a temporary egg tooth they use to crack, pip, or break the eggshell or covering. The largest recorded egg is from a whale shark and was in size. Whale shark eggs typically hatch within the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antenna (biology)
An antenna (plural: antennae) is one of a pair of appendages used for Sensory system, sensing in arthropods. Antennae are sometimes referred to as ''feelers''. Antennae are connected to the first one or two Segmentation (biology), segments of the arthropod head. They vary widely in form but are always made of one or more jointed segments. While they are typically sensory organs, the exact nature of what they sense and how they sense it is not the same in all groups. Functions may variously include sensing tactition, touch, air motion, heat, vibration (sound), and especially insect olfaction, smell or gustation, taste. Antennae are sometimes modified for other purposes, such as mating, brooding, swimming, and even anchoring the arthropod to a substrate (biology), substrate. Larval arthropods have antennae that differ from those of the adult. Many crustaceans, for example, have free-swimming larvae that use their antennae for swimming. Antennae can also locate other group members i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pheromones
A pheromone () is a secreted or excreted chemical factor that triggers a social response in members of the same species. Pheromones are chemicals capable of acting like hormones outside the body of the secreting individual, to affect the behavior of the receiving individuals. There are '' alarm pheromones'', ''food trail pheromones'', '' sex pheromones'', and many others that affect behavior or physiology. Pheromones are used by many organisms, from basic unicellular prokaryotes to complex multicellular eukaryotes. Their use among insects has been particularly well documented. In addition, some vertebrates, plants and ciliates communicate by using pheromones. The ecological functions and evolution of pheromones are a major topic of research in the field of chemical ecology. Background The portmanteau word "pheromone" was coined by Peter Karlson and Martin Lüscher in 1959, based on the Greek () and (). Pheromones are also sometimes classified as ecto-hormones ("ecto-" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemolymph
Hemolymph, or haemolymph, is a fluid, similar to the blood in invertebrates, that circulates in the inside of the arthropod's body, remaining in direct contact with the animal's tissues. It is composed of a fluid plasma in which hemolymph cells called hemocytes are dispersed. In addition to hemocytes, the plasma also contains many chemicals. It is the major tissue type of the open circulatory system characteristic of arthropods (for example, arachnids, crustaceans and insects). In addition, some non-arthropods such as mollusks possess a hemolymphatic circulatory system. Oxygen-transport systems were long thought unnecessary in insects, but ancestral and functional hemocyanin has been found in the hemolymph. Insect "blood" generally does not carry hemoglobin, although hemoglobin may be present in the tracheal system instead and play some role in respiration. Method of transport In the grasshopper, the closed portion of the system consists of tubular hearts and an ao ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hickory Horned Devil Missouri Ozarks
Hickory is a common name for trees composing the genus ''Carya'', which includes 19 species accepted by ''Plants of the World Online''. Seven species are native to southeast Asia in China, Indochina, and northeastern India (Assam), and twelve are native to North America. A number of hickory species are used for their edible nuts or for their wood. Etymology The name "hickory" derives from a Native American word in an Algonquian language (perhaps Powhatan). It is a shortening of ''pockerchicory'', ''pocohicora'', or a similar word, which may be the name for the hickory tree's nut, or may be a milky drink made from such nuts. The genus name ''Carya'' is , ''káryon'', meaning "nut". Description Hickories are temperate to subtropical forest trees with pinnately compound leaves and large nuts. Most are deciduous, but one species (''C. sinensis'', syn. ''Annamocarya sinensis'') in southeast Asia is evergreen. Hickory flowers are small, yellow-green catkins produced in spring. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
