Skip to main content

Javan hawk-eagle (Nisaetus bartelsi)

The Javan hawk-eagle or Javanese eagle or Elang Jawa (Nisaetus bartelsi) is one of the endemic eagle species on Mount Merapi, medium to large, and slim with a length of up to 70 cm. The reddish-brown head (cadre) has a crest of 2 to 4 feathers for up to 12 cm long and a yellowish brown neck.

Black crested with white ends, black crown and mustache, while back and wings are dark brown. The esophagus is whitish with a long black line in the middle. The chest has black streaks spread over the brownish yellow which eventually turn into a dense line pattern and red transverse above the whitish color of the abdominal and leg feathers.

Dlium Javan hawk-eagle (Nisaetus bartelsi)


Feathers cover the legs to close to the base of the finger. A brownish tail with four dark lines and a wide cross is clearly visible on the lower side, and the tip of the tail is thin white striped. Females are similar in color, but have a slightly larger size.

The iris is yellow and brownish, half-black, sera yellowish, and yellowish legs. Young birds have a head, neck and lower body with brown wood and without streaks or lines.

Javanese eagles fly and shout loud and repetitive sounds, like klii-iiw, which vary from one to three syllables. High and fast pitched sounds like kli-kli-kli-kli-kli. This sound is similar to Spizaetus cirrhatus, although it has clear differences in tone.

The distribution of these eagles is limited to Java and only in primary forests in the transition from the lowlands to the mountains. Most are found in half the southern hemisphere of Java where these birds live specializing in sloping areas, but have cruises to the coast in the lowlands and up to 3,000 meters above sea level.



Eagle is one of the top predators in the food chain cycle of a forest ecosystem. This bird hunts from a place perched on tall trees in the forest to glide and ambush reptiles, birds, pigs, native chickens, squirrels, bats, civets, and monkeys.

The laying period begins in January to June in a pile of leafy branches arranged in trees as high as 20-30 meters. Only one egg and was incubated for 47 days. Nests are generally in Rasamala (Altingia excelsa), pairs (Lithocarpus sundaicus), tusam (Pinus merkusii), puspa (Schima wallichii), and ki sireum (Eugenia clavimyrtus).

Dlium.com Javan hawk-eagle (Nisaetus bartelsi)


Javanese eagle was known in 1820 when van Hasselt and Kuhl collected two specimens for the Leiden Museum, but until the end of the 19th century it was still considered as Spizaetus. The IUCN included Javanese eagles in the status of EN (Endangered) and the Indonesian Government designated them as animals protected by law.

The bird monitoring team at the Mount Merapi National Park Center conducted regular observations on eagles and other raptor to monitor this bird on Mount Merapi. Javanese eagles are less competitive than Black Hawk (Ictinaetus malayensis) and Bido Eagle (Spilornis cheela), also by habitat degradation.



Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Accipitriformes
Family: Accipitridae
Genus: Nisaetus
Species: N. bartelsi
Labels:

Comments

Post a Comment

Popular

Indian rosewood (Dalbergia latifolia)

Sonokeling or Java palisandre or Indian rosewood ( Dalbergia latifolia ) is a species of plant in the Fabaceae, a large tree producing hardwood, medium weight and high quality, rounded leaves, thin and broad pods, highly adaptive, grows in dry and rocky landscapes with lots of sunlight. D. latifolia has medium to large size, cylindrical stems, up to 40 m high with a ring of up to 2 m, the bark is brownish gray and slightly cracked longitudinally. The crown is dense, dome-shaped and sheds leaves. The leaves are compound and pinnate oddly with 5-7 strands that have different sizes and appear alternately on the shaft. The leaves are round or elongated in width or heart, the upper surface is green and the surface is pale green. The flowers are small, 0.5-1 cm long and clustered in panicles. The pods are green to brown when ripe and are elongated lanceolate, pointed at the base and tip. The pods have 1-4 seeds which are soft and brownish. Indian rosewood grows at elevations below 600 m,
2 comments
Read more

Soapbush (Clidemia hirta)

Senggani bulu or soapbush or Koster's curse ( Clidemia hirta ) is a species of tropical plants, perennial shrubs, grows as high as 0.5-3 m, but sometimes reaches 5 m in more shady habitat, young stems are round and covered with hair, stiff, reddish brown. C. hirta has simple leaves arranged opposite to the stem, oval-shaped in a wide line at the base with a pointed tip and almost entirely to a smooth jagged margin. The upper surface is rarely covered with hair, while the lower surface has thick hair. The leaves have a rather tangled appearance and five main veins are straight, curved and spread in parallel from the base of the leaf to the tip. Minor veins spread transversely and straightly that connect the five main veins. The flowers are arranged in small clusters at the ends of branches, growing on very short stems and having five white petals or sometimes pale pinks. The base of the flower is covered with a mixture of coarse and sticky hair, five sepals but these are ver
Post a Comment
Read more

Melinjo (Gnetum gnemon)

Melinjo or belinjo or tangkil ( Gnetum gnemon ) is a species of gymnosperms in Gnetaceae, dioecious, tree-shaped, living wild but also widely planted in the yard as a shade or barrier where seeds, seed coat and young leaves are processed into food. G. gnemon is a tree and has a straight trunk, this is different from other Gnetum which is usually a liana. Annual plants with open seeds, do not produce true flowers and fruit. Fake fruit is basically a seed wrapped in a layer of aryl fleshy. Single leaf oval and blunt tip. Melinjo live for more than 100 years, 25 m tall and produce 80-100 kg of seeds per harvest. They adapt to a wide temperature range and are very easy to find in various areas except the coast. Grows in forests, plantations and home gardens. Plants are propagated by generative and vegetative methods. Belinjo can be found in arid, tropical regions and does not require highly nutritious soils or special climates. Grow on clay, sandy and calcareous soil at an altitude of
Post a Comment
Read more