Skip to main content

Green marsh hawk (Orthetrum sabina)

Ndok erok or capung badak or slender skimmer or green marsh hawk (Orthetrum sabina) is an animal species in the Libellulidae, medium sized dragonfly with wingspan of 60-85mm, green eyes, adults yellow to green with black stripes on the thirax and abdomen.

O. sabina has a pair of large, green eyes with black plots. A pair of transparent wings with black veins and white margins. Long white and black tail. The legs are black with green plots and have a long row of spikes.

Dlium Green marsh hawk (Orthetrum sabina)


Females and males are similar in shape, color and size, but differ in sexual characteristics. This species is known as a fierce predator that preys on other dragonflies that are larger. Predatory activity has started since the larval stage, which preys on tadpoles and small fish.

Green marsh hawk underwent an incomplete metamorphosis which lays the eggs in water to become nymphs and then larvae. Adults will take their wings and come out of the water to fly freely. Larvae can live up to three years, while adult dragonflies are only about 4 months.

Ndok erok roost not to move in bushes and dry twigs for long periods of time. They are able to catch almost all their prey with a success rate of 95 percent, and often eat butterflies and other types of dragonflies while still flying.





Kingdom: Animalia
Phylum: Euarthropoda
Subphylum: Hexapoda
Class: Insecta
Subclass: Pterygota
Order: Odonata
Suborder: Anisoptera
Family: Libellulidae
Genus: Orthetrum
Species: Orthetrum sabina
Subspecies: Orthetrum sabina ssp. sabina

Popular Posts

Humpback whales (Megaptera novaeangliae) manufacture bubble-nets as tools to increase prey intake

NEWS - Humpback whales ( Megaptera novaeangliae ) create bubble net tools while foraging, consisting of internal tangential rings, and actively control the number of rings, their size, depth and horizontal spacing between the surrounding bubbles. These structural elements of the net increase prey intake sevenfold. Researchers have known that humpback whales create “bubble nets” for hunting, but the new report shows that the animals also manipulate them in a variety of ways to maximize catches. The behavior places humpbacks among the rare animals that make and use their own tools. “Many animals use tools to help them find food, but very few actually make or modify these tools themselves,” said Lars Bejder, director of the Marine Mammal Research Program (MMRP), University of Hawaii at Manoa. “Humpback whales in southeast Alaska create elaborate bubble nets to catch krill. They skillfully blow bubbles in patterns that form a web with internal rings. They actively control details such ...

Takenoshin Nakai swallow-wort (Vincetoxicum nakaianum) replaces V. magnificum and C. magnificum

NEWS - Researchers reported an erect herbaceous species distributed in the eastern part of Honshu Island, Vincetoxicum magnificum (Nakai) Kitag. based on Cynanchum magnificum Nakai, nomen nudum. Therefore, they named this species Takenoshin Nakai swallow-wort ( Vincetoxicum nakaianum K.Mochizuki & Ohi-Toma). Vincetoxicum Wolf (Asclepiadeae) is the third largest genus in the Asclepiadoideae consisting of about 260 species geographically extending from tropical Africa, Asia and Oceania to temperate regions of Eurasia. A total of 23 species are known from Japan, including 16 endemic species. Molecular phylogeny divides Japanese Vincetoxicum into four groups: the “Far Eastern” clade consisting of 11 endemic species and 4 more widespread species, 1 sister species to the “Far Eastern” clade, the “subtropical” clade consisting of 2 species and the “Vincetoxicum s. str.” clade consisting of 5 species. V. magnificum (Nakai) Kitag. (Japanese: tachi-gashiwa) is closely related to V. macro...

Purhepecha oak (Quercus purhepecha), new species of shrub oak endemic to the state of Michoacán, Mexico

NEWS - In Mexico, several Quercus shrubby species are taxonomically very problematic including 8 taxa with similar characteristics. Now researchers report the purhepecha oak ( Quercus purhepecha De Luna-Bonilla, S. Valencia & Coombes sp. nov.) as a new tomentose shrubby white oak species with a distribution only in the Cuitzeo basin in the Trans-Mexican Volcanic Belt (TMVB). Quercus Linnaeus (1753) subdivided into 2 subgenera and 8 sections of which section Quercus (white oaks) has the widest distribution in the Americas, Asia and Europe. This section is very diverse in Mexico and Central America with phylogenomic evidence indicating recent and accelerated speciation in these regions. The number of shrubby oak species in Mexico is still uncertain. De Luna-Bonilla of the Universidad Nacional Autónoma de México and colleagues found at least 3 taxa in the TMVB, specifically Quercus frutex Trelease (1924), Quercus microphylla Née (1801) and Quercus repanda Bonpland (1809). In 2016,...