The Dayak fruit bat or Dyak fruit bat (Dyacopterus spadiceus) is found in Sumatra, Borneo, the Philippines, and the Malay Peninsula. Males of the species have large, swollen nipples that lactate. The Dayak fruit bat is the only known mammalian species where male lactation might be standard. Male nipples are still smaller than those of females and produce only about a tenth as much milk. The cause and purpose of this phenomenon is unknown, it may be a side effect of phytoestrogens in leaves in the bats diet, or it may be an actual adaptation to feed the bats young. Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Binomial name Aptenodytes forsteri Gray, 1844 For other uses, see Animal (disambiguation). ... Typical Classes Subphylum Urochordata - Tunicatas Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Orders Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Eutheria (includes extinct ancestors)/Placentalia (excludes extinct ancestors) Afrosoricida Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Mesonychia (extinct) Notoungulata (extinct) Perissodactyla Pholidota Plesiadapiformes... This article is about mammals. ... Large flying fox (Pteropus vampyrus) Megabats constitute the suborder Megachiroptera within the order Chiroptera ( bats). ... In biology, binomial nomenclature is the formal method of naming species. ... Michael Rogers Oldfield Thomas (February 21, 1858 - June 16, 1929) was a British zoologist. ... Sumatra (also spelled Sumatara and Sumatera) is the sixth largest island of the world (approximately 470,000 km²) and is the 3rd largest island of Indonesia after Kalimantan and New Guinea. ... Borneo and Sulawesi. ... The Malay Peninsula (Malay: Semenanjung Tanah Melayu) is a major peninsula located in Southeast Asia. ... In its most general form, a nipple is an appurtenance from which a fluid emanates, in this instance breast milk, to nurture a mothers young. ... Lactation describes the secretion of milk from the mammary glands, the process of providing that milk to the young, and the period of time that a mother lactates to feed her young. ... The phenomenon of male lactation in humans has become more common in recent years due to the use of medications that stimulate a human males mammary glands. ... Phytoestrogens are trace substances in our food which mimic and supplement the action of the bodys own hormone, estrogen (sometimes spelt as oestrogen). They are a comparatively recent discovery, and researchers are still exploring the nutritional role of these substances in such diverse metabolic functions as the regulation of...
References
Francis, Charles M., et al; "Lactation in Male Fruit Bats," Nature, 367:691, 1994.
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