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Acorn Woodpecker
The acorn woodpecker (''Melanerpes formicivorus'') is a medium-sized woodpecker with a length of around , and an average weight of . It is found across Central America, as well as North into the western United States and South into parts of Colombia. Taxonomy The acorn woodpecker was formally described in 1827 by the English naturalist William Swainson under the binomial name ''Picus formicivorus'' from a specimen collected in Mexico. The specific epithet combines the Latin ''formica'' meaning "ant" with ''-vorus'' meaning "eating". The type locality is Temascaltepec in Mexico. The acorn woodpecker is one of 24 species now placed in the genus ''Melanerpes'' that was introduced by Swainson in 1832. Within ''Melanerpes'' the acorn woodpecker is sister to a clade containing two South American species: the white woodpecker (''Melanerpes candidus'') and the white-fronted woodpecker (''Melanerpes cactorum''). Seven subspecies are recognised: * ''M. f. bairdi'' Ridgway, 1881 – O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California
California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an international border with the Mexico, Mexican state of Baja California to the south. With almost 40million residents across an area of , it is the List of states and territories of the United States by population, largest state by population and List of U.S. states and territories by area, third-largest by area. Prior to European colonization of the Americas, European colonization, California was one of the most culturally and linguistically diverse areas in pre-Columbian North America. European exploration in the 16th and 17th centuries led to the colonization by the Spanish Empire. The area became a part of Mexico in 1821, following Mexican War of Independence, its successful war for independence, but Mexican Cession, was ceded to the U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-fronted Woodpecker
The white-fronted woodpecker (''Melanerpes cactorum'') is a species of bird in the family Picidae. It is found mainly in Bolivia, Paraguay and Argentina. Its natural habitats are subtropical or tropical dry forests, subtropical or tropical dry shrubland, and subtropical or tropical high-altitude shrubland. Description The adult white-fronted woodpecker is about in length. The sexes are similar in appearance except for a small patch of red, not always visible, on the crown in males. The crown, nape and upper parts are glossy black, apart from a thin white line running from a white nape patch down the centre of the back. A black mask surrounds the eye and extends to the mantle. The upper side of the wings is bluish-black, boldly barred with white, and the underside is browner. The upper side of the tail is black with white markings and the underside is browner. The fore-crown and cheeks are white, and the chin and throat are white, yellow or buff. The breast and belly are some shad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helpers At The Nest
Helpers at the nest is a term used in behavioural ecology and evolutionary biology to describe a social structure in which juveniles and sexually mature adolescents of either one or both sexes remain in association with their parents and help them raise subsequent broods or litters, instead of dispersing and beginning to reproduce themselves. This phenomenon was first studied in birds where it occurs most frequently, but it is also known in animals from many different groups including mammals and insects. It is a simple form of co-operative breeding. The effects of helpers usually amount to a net benefit, however, benefits are not uniformly distributed by all helpers nor across all species that exhibit this behaviour. There are multiple proposed explanations for the behaviour, but its variability and broad taxonomic occurrences result in simultaneously plausible theories.Dickinson, J. L.; Hatchwell, B. J. (2004) "Fitness consequences of helping" in ''Ecology and evolution of coo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breeding Collective
Cooperative breeding is a social system characterized by alloparental care: offspring receive care not only from their parents, but also from additional group members, often called helpers. Cooperative breeding encompasses a wide variety of group structures, from a breeding pair with helpers that are offspring from a previous season, to groups with multiple breeding males and females (polygynandry) and helpers that are the adult offspring of some but not all of the breeders in the group, to groups in which helpers sometimes achieve co-breeding status by producing their own offspring as part of the group's brood. Cooperative breeding occurs across taxonomic groups including birds, mammals, fish, and insects. Costs for helpers include a fitness reduction, increased territory defense, offspring guarding and an increased cost of growth. Benefits for helpers include a reduced chance of predation, increased foraging time, territory inheritance, increased environmental conditions and an i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southwestern United States
The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural list of regions of the United States, region of the United States that includes Arizona and New Mexico, along with adjacent portions of California, Colorado, Nevada, Oklahoma, Texas, and Utah. The largest cities by List of metropolitan statistical areas, metropolitan area are Phoenix, Arizona, Phoenix, Las Vegas, El Paso, Texas, El Paso, Albuquerque, and Tucson, Arizona, Tucson. Before 1848, in the historical region of Santa Fe de Nuevo México as well as parts of Alta California and Coahuila y Tejas, settlement was almost non-existent outside of New Mexico's pueblos and Santa Fe de Nuevo México#Regions and municipalities, Spanish or Mexican municipalities. Much of the area had been a part of New Spain and Mexico until the United States acquired the area through the Treaty of Guadalupe Hidalgo in 1848 and the smaller Gadsden Purchase in 1854. While the regio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oregon
Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of its eastern boundary with Idaho. The 42nd parallel north, 42° north parallel delineates the southern boundary with California and Nevada. The western boundary is formed by the Pacific Ocean. Oregon has been home to many Indigenous peoples of the Americas, indigenous nations for thousands of years. The first European traders, explorers, and settlers began exploring what is now Oregon's Pacific coast in the early to mid-16th century. As early as 1564, the Spanish expeditions to the Pacific Northwest, Spanish began sending vessels northeast from the Philippines, riding the Kuroshio Current in a sweeping circular route across the northern part of the Pacific. In 1592, Juan de Fuca undertook detailed mapping a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acorn
The acorn is the nut (fruit), nut of the oaks and their close relatives (genera ''Quercus'', ''Notholithocarpus'' and ''Lithocarpus'', in the family Fagaceae). It usually contains a seedling surrounded by two cotyledons (seedling leaves), enclosed in a tough Nutshell, shell known as the pericarp, and borne in a cup-shaped Calybium, cupule. Acorns are long and on the fat side. Acorns take between 5 and 24 months (depending on the species) to mature; see the List of Quercus species, list of ''Quercus'' species for details of oak classification, in which acorn morphology (biology), morphology and phenology are important factors. Etymology The word ''acorn'' (earlier ''akerne'', and ''acharn'') is related to the gothic language, Gothic name ''akran'', which had the sense of "fruit of the unenclosed land". The word was applied to the most important forest produce, that of the oak. Geoffrey Chaucer, Chaucer spoke of "achornes of okes" in the 14th century. By degrees, popular etym ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Malherbe
Alfred Malherbe (14 July 1804 – 14 August 1865) was a French magistrate and amateur naturalist born in Mauritius to Pierre Marie François Malherbe and Rosalie Le Meusnier Molineuf. The family originally came from Metz. Alfred became the administrator of the Museum of Metz (being its director until 1863). He devoted his spare time to botany and zoology (especially ornithology). He conducted studies of birds of Algeria (describing numerous species) and Sicily. Malherbe was the author of Monographie des picidées' (1859–62, 4 vols.), the first global survey of the woodpeckers. He described and named Levaillant's woodpecker, after French ornithologist François Le Vaillant. In addition to ''Monographie des picidées'', he was the author of several other ornithological works: * ''Faune ornithologique de la Sicile : avec des observations sur l'habitat ou l'apparition des oiseaux de cette île'', etc. (1843) - Ornithological fauna of Sicily. * ''Description de dix espéces nouve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adriaan Joseph Van Rossem
Adriaan Joseph van Rossem (December 17, 1892 in Chicago – September 4, 1949) was an American ornithologist of Dutch ancestry. He came from an affluent family where his father died very early in his life. Van Rossem went on to attend both public and private schools. In his teens he became influenced by Joseph Grinnell who led him into ornithology. He later did much work with Donald Ryder Dickey and shared the 1941 Brewster Medal The William Brewster Memorial Award, usually referred to as the Brewster Medal, is awarded by the American Ornithologists' Union and is named for ornithologist William Brewster. It is given to an author, or coauthors who are not previous recipients ... with him. He was curator of the Donald Ryder Dickey Collection (first housed at the California Institute of Technology and later at the University of California Los Angeles) from 1912 to his death. He was a 1939 Guggenheim Fellow and received an honorary doctorate from Occidental College in 1948. R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donald Ryder Dickey
Donald Ryder Dickey (1887–1932) was an American ornithologist, mammalogist, and nature photographer. He collected 50,000 specimens and produced 7,500 photographs and moving images of nature subjects. At his death, his collection of bird and mammal specimens was the largest private collection in the United States. Biography Donald Ryder Dickey was born on March 31, 1887, in Dubuque, Iowa, the son of Anna Roberts Ryder and Ernest May Dickey (superintendent of the Diamond Joe Steamship Line). In 1902, Dickey and his mother, also an avid naturalist, joined a Sierra Club group hiking King's River Cañon and climbing Mount Whitney. Others on this trip included John Muir, C. Hart Merriam, Dr. Henry Gannett, historian Theodore Hittell and landscape artist William Keith (artist), William Keith. Dickey entered the University of California in 1906, but received his B.A. degree (with honors) from Yale University in 1910. His collegiate society memberships included Psi Upsilon, Elihu, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiapas
Chiapas, officially the Free and Sovereign State of Chiapas, is one of the states that make up the Political divisions of Mexico, 32 federal entities of Mexico. It comprises Municipalities of Chiapas, 124 municipalities and its capital and largest city is Tuxtla Gutiérrez. Other important population centers in Chiapas include Ocosingo, Tapachula, San Cristóbal de las Casas, Comitán, and Arriaga, Chiapas, Arriaga. Chiapas is the southernmost state in Mexico, and it borders the states of Oaxaca to the west, Veracruz to the northwest, and Tabasco to the north, and the Petén Department, Petén, Quiché Department, Quiché, Huehuetenango Department, Huehuetenango, and San Marcos Department, San Marcos departments of Guatemala to the east and southeast. Chiapas has a significant coastline on the Pacific Ocean to the southwest. In general, Chiapas has a humid, tropical climate. In the northern area bordering Tabasco, near Teapa Municipality, Teapa, rainfall can average more than pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spencer Fullerton Baird
Spencer Fullerton Baird (; February 3, 1823 – August 19, 1887) was an American naturalist, ornithologist, ichthyologist, Herpetology, herpetologist, and museum curator. Baird was the first curator to be named at the Smithsonian Institution. He eventually served as assistant Secretary of the Smithsonian from 1850 to 1878, and as Secretary from 1878 until 1887. He was dedicated to expanding the natural history collections of the Smithsonian which he increased from 6,000 specimens in 1850 to over 2 million by the time of his death. He also served as the U.S. United States Fish Commission, Commissioner of Fish and Fisheries from 1871 to 1887 and published over 1,000 works during his lifetime. Early life and education Spencer Fullerton Baird was born in Reading, Pennsylvania in 1823. His mother was a member of the prominent Philadelphia Biddle family; he was a nephew of Speaker of the Pennsylvania Senate Charles B. Penrose and a first cousin, once removed, of U.S. Senator Boies Penr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
