SFL Educational News Service
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| Blue Dragon Sea Slug (Glaucus atlanticus) Photo Credit: Sylke Rohrlach (CC BY-SA 2.0) |
Glaucus atlanticus is a species of small, pelagic aeolid nudibranch classified within the family Glaucidae and the order Nudibranchia. As an obligate neustonic organism, this species is globally distributed throughout the circumtropical and temperate oceans, primarily occupying the epipelagic zone where it floats inverted at the air-water interface.
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| Axolotl (Ambystoma mexicanum) Photo Credit: LoKiLeCh (CC BY-SA 3.0) |
The axolotl (Ambystoma mexicanum) is a paedomorphic amphibian belonging to the family Ambystomatidae within the order Urodela (Caudata). Historically distributed throughout the high-altitude lakes of the Valley of Mexico, its natural geographic range is currently restricted to the highly modified canal system and wetland remnants of Lake Xochimilco in southern Mexico City.
Tasmanian devil (Sarcophilus harrisii)
Photo Credit: JJ Harrison
(CC BY-SA 3.0)
Taxonomic Definition
The Tasmanian devil (Sarcophilus harrisii) is a carnivorous marsupial belonging to the family Dasyuridae within the order Dasyuromorphia. It represents the largest extant carnivorous marsupial globally following the extinction of the thylacine (Thylacinus cynocephalus). Historically distributed across the Australian mainland, its current natural geographic range is strictly endemic to the island state of Tasmania.
The American woodcock (Scolopax minor)
Photo Credit: Rhododendrites
(CC BY-SA 4.0)
Taxonomic Definition
The American woodcock (Scolopax minor) is a species of wading bird classified within the family Scolopacidae and the order Charadriiformes. Despite its taxonomic placement among shorebirds, it is primarily an upland species endemic to the eastern half of North America. Its geographical range spans from the boreal forests of southern Canada to the Gulf Coast of the United States, predominantly occupying early successional habitats, young forests, and moist woodlands.
Sandhill Cranes (Antigone canadensis)
Photo Credit: Frank Schulenburg
(CC BY-SA 4.0)
Taxonomic Definition
Antigone canadensis is a large, terrestrial avian species belonging to the family Gruidae within the order Gruiformes. While historically classified under the genus Grus, comprehensive molecular DNA analyses revealed a distinct evolutionary clade, prompting its reclassification into the genus Antigone alongside species such as the Sarus and White-naped Cranes. The species maintains a vast geographical distribution across North America, with breeding populations extending into northeastern Siberia and isolated, non-migratory populations situated in the southeastern United States and Cuba.
Wild red-tailed bumblebees (Bombus lapidarius)
Left queen | Right drone
Photo Credit: Ivar Leidus
Changes made: Combined images
(CC BY-SA 4.0)
Taxonomic Definition
Bombus lapidarius is a species of eusocial bumblebee classified within the order Hymenoptera, the family Apidae, and the subgenus Melanobombus. Its primary geographical range encompasses the Palearctic realm, widely distributed across temperate regions of Europe and extending into Western Asia and parts of Northern Africa.
Mediterranean monk seal (Monachus monachus)
Photo Credit: Marinko Babić
(CC BY-SA 4.0)
Changes made: Enhanced color and sharpness
Taxonomic Definition
The Mediterranean monk seal (Monachus monachus) is a marine mammal belonging to the family Phocidae (earless seals) within the order Carnivora. Once distributed widely throughout the Mediterranean Sea, the Black Sea, and the North Atlantic coast of Africa, its extant geographical range is now severely restricted and fragmented. Current demographics are largely confined to isolated populations in the eastern Mediterranean basin, the Cabo Blanco peninsula on the Atlantic coast of Africa, and the Madeira archipelago.
Muskrat (Ondatra zibethicus)
Photo Credit: D. Gordon E. Robertson
(CC BY-SA 3.0)
Taxonomic Definition
The muskrat (Ondatra zibethicus) is a medium-sized, semiaquatic rodent classified within the order Rodentia and the family Cricetidae, belonging specifically to the subfamily Arvicolinae alongside voles and lemmings. It is the sole extant member of the genus Ondatra and is endemic to a vast geographical range across North America, spanning from the Canadian treeline to the northern border of Mexico. Due to historical fur-trade introductions, it has also established extensive, often invasive, populations throughout the riparian and wetland ecosystems of Europe, Asia, and South America.
The genus Macrotis, commonly known as bilbies, represents a distinct lineage of desert-dwelling marsupial omnivores classified within the family Thylacomyidae and the order Peramelemorphia. Historically distributed across roughly 70% of the Australian landmass, their primary geographical range is now severely restricted to isolated, arid and semi-arid patches in the Northern Territory, Western Australia, and southwestern Queensland.
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| Wolverine (Gulo gulo) Photo Credit: Spencer Wright (CC BY 2.0) |
Gulo gulo is a terrestrial carnivorous mammal belonging to the family Mustelidae within the order Carnivora, representing the largest land-dwelling species of its family. Its geographic distribution encompasses the boreal forests, taiga, and alpine tundra regions of the Northern Hemisphere, spanning North America, Europe, and Asia.
Arabian fat-tailed scorpion (Androctonus crassicauda)
Photo Credit: Per-Anders Olsson
(CC BY-SA 4.0)
Changes made: Enhanced and enlarged by Scientific Frontline
Taxonomic Definition
The Arabian fat-tailed scorpion (Androctonus crassicauda) is a highly venomous arachnid classified within the family Buthidae and the order Scorpiones. As a generalist desert species, its primary geographical range encompasses the Palearctic region, spanning across the Middle East—including Saudi Arabia, Iran, Iraq, Israel, Syria, Jordan, and Turkey—as well as the Sinai Peninsula in North Africa.
Siberian crane (Leucogeranus leucogeranus)
Taxonomic Definition
The Siberian crane (Leucogeranus leucogeranus) is a large, critically endangered avian species belonging to the family Gruidae within the order Gruiformes. It represents a monotypic lineage, functioning as the sole extant member of the genus Leucogeranus. Its primary geographical range spans vast migratory corridors across Eurasia, with breeding grounds restricted to the Arctic tundra of Russia and principal wintering grounds localized in the middle and lower Yangtze River Basin in China, alongside a relic wintering site in Iran.
Blue-sided leaf frog (Agalychnis annae)
Photo Credit: Charles J. Sharp
(CC BY-SA 4.0)
Taxonomic Definition
Agalychnis annae is a nocturnal arboreal anuran belonging to the family Phyllomedusidae and the order Anura. Endemic to Costa Rica, its primary distribution is restricted to the Central Valley and the adjacent slopes of the Cordillera de Talamanca and Cordillera Central, where it inhabits premontane moist forests and, increasingly, anthropogenic environments.
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Eastern Hercules beetle (Dynastes tityus) Male
Photo Credit: David Hill
(CC BY 4.0)
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| Female Photo Credit: Fredlyfish4 (CC BY 4.0) |
Taxonomic Definition
Dynastes tityus is a coleopteran arthropod belonging to the family Scarabaeidae and the subfamily Dynastinae (rhinoceros beetles). It is the heaviest and one of the largest beetles native to the United States, with a distribution primarily confined to the deciduous forests of the eastern and southeastern United States, ranging from New York to Florida and west to Texas.
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| Shoebill Stork (Balaeniceps rex) Photo Credit: Hans Hillewaert (CC BY-SA 3.0) |
Balaeniceps rex is a large, monotypic avian species comprising the sole extant member of the family Balaenicipitidae. Historically classified within Ciconiiformes (storks), modern molecular phylogenetics places it within the order Pelecaniformes, closely allied with pelicans and hamerkops. Its range is strictly limited to the freshwater swamps and extensive papyrus wetlands of East-Central Africa, primarily in South Sudan, Uganda, western Tanzania, and northern Zambia.
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| Image Credit: Scientific Frontline |
Arapaima gigas, colloquially known as the pirarucu, is a giant neotropical freshwater teleost belonging to the family Arapaimidae within the order Osteoglossiformes (bonytongues). It is endemic to the Amazon Basin, predominantly inhabiting the floodplains (várzea) and slow-moving tributaries of Northern South America, including Brazil, Peru, and Guyana. This species represents one of the largest extant freshwater fishes, morphologically characterized by a broad, bony head and a streamlined, sub-cylindrical body.
Texas Horned Lizard
Phrynosoma cornutum
(Public Domain)
Taxonomic Definition
The genus Phrynosoma (from the Greek phrynos, "toad," and soma, "body") comprises a distinct group of squamate reptiles within the family Phrynosomatidae, order Squamata. Characterized by a dorsoventrally flattened body plan, short tail, and prominent occipital and temporal spines (horns), these lizards are endemic to North and Central America. Their range extends from southern Canada through the western United States and Mexico into Guatemala, inhabiting diverse arid and semi-arid biomes including deserts, grasslands, and pine-oak woodlands.
Roadrunner (Geococcyx)
Left:Lesser Roadrunner (Geococcyx velox) Right:Greater Roadrunner (Geococcyx californianus)
Image Credits: (Lesser):Francesco Veronesi (Greater): Jessie Eastland
(CC BY-SA 4.0)
Taxonomic Definition
The genus Geococcyx comprises two species of fast-running ground cuckoos within the family Cuculidae and the order Cuculiformes. Native to the arid and semi-arid scrublands of the Southwestern United States, Mexico, and Central America, these birds are morphologically distinct from their arboreal relatives due to their terrestrial specializations. They are defined by their zygodactyl feet, elongated tails used for balance, and high-speed cursorial locomotion.
The Silky Shark (Carcharhinus falciformis)
Photo Credit: Alex Chernikh
(CC BY-SA 4.0)
Taxonomic Definition
The Silky Shark (Carcharhinus falciformis) is a large, migratory pelagic shark belonging to the family Carcharhinidae (Requiem Sharks) and the order Carcharhiniformes. It is a circumtropical species, ubiquitously distributed across the Atlantic, Pacific, and Indian Oceans, typically inhabiting the epipelagic zone from the surface down to at least 500 meters, often near continental shelf edges.
Spix's macaw (Cyanopsitta spixii)
Image Credit: Scientific Frontline / stock image
Taxonomic Definition
Spix's macaw is a medium-sized Neotropical parrot belonging to the family Psittacidae and the order Psittaciformes. It is the sole representative of the monotypic genus Cyanopsitta, distinguished by its cyan-blue plumage and facial skin that fades from grey to white as the bird matures. The species is endemic to the Caatinga dry forest biome of northeastern Brazil, specifically restricted to riparian gallery woodlands dominated by Caraibeira trees (Tabebuia aurea) along seasonal creek systems in the São Francisco River basin.
Scientific Frontline: Extended "At a Glance" Summary : Quorum Sensing The Core Concept : Quorum sensing is a sophisticated, popula...
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