Wednesday, 18 March 2020
14-3-2020 TURTLE BEECH KERALA, INDIA - PHILIPPINE GROUND ORCHID (Spathoglottis plicata)
Spathoglottis plicata, commonly known as the Philippine ground orchid, or large purple orchid is an evergreen, terrestrial plant with crowded pseudobulbs, three or four large, pleated leaves and up to forty resupinate, pink to purple flowers. It is found from tropical and subtropical Asia to Australia and the western Pacific including Tonga and Samoa.
Spathoglottis plicata is an evergreen, terrestrial herb that forms tall clumps. It has crowded pseudobulbs 40–60 mm (1.6–2.4 in) long and 20–40 mm (0.8–2 in) wide, each with three or four pleated leaves 50–90 mm (2–4 in) long and 8–15 mm (0.3–0.6 in) wide on a stalk 80–150 mm (3–6 in) long. Up to forty deep pink to purple resupinate flowers 35–55 mm (1–2 in) long and wide are borne on a hairy flowering stem 50–100 cm (20–40 in) tall. The dorsal sepal is 20–30 mm (0.8–1 in) long and the lateral sepals are slightly narrower. The petals are about the same length as the sepals but significantly wider. The labellum is T-shaped, a similar size to the dorsal sepal and has three lobes with the side lobes close to vertical. At the tip of the column there is a cap, under which masses of yellow pollen grains can be seen.
Flowering occurs from September to April in Australia and in most months in China and New Guinea. The fruit is a capsule about 3 mm (0.1 in) long, green and cylindrical. After the flower is fertilized, the seeds take about six weeks to develop. When ripe, the capsule splits open and thousands of tiny seeds are carried away by wind.
14-3-2020 TURTLE BEECH KERALA, INDIA - COMMON PICTURE WING DRAGONFLY (Rhyothemis variegata)
Rhyothemis variegata, known as the common picture wing, variegated flutterer, yellow-striped flutterer or yellow-barred flutterer, is a species of dragonfly of the family Libellulidae, found in South Asia, Indochina, southern China, Indonesia, Papua New Guinea, Australia and islands in the Pacific Ocean.
Rhyothemis variegata is a medium-sized dark bodied dragonfly with colorful wings tinted with pale yellow. There are a few black spots on the apices and nodes of the fore-wings. There is a large patch in the base of the hind-wings, marked with black and golden yellow. In females, the apical half of the fore-wings are transparent; basal half tinted with golden-yellow with black marks. The apical ends of the hind-wings are transparent; rest of wings marked with golden-yellow and black.
It breeds in marshes, ponds and paddy fields. They appear to have weak flight and can easily be mistaken for butterflies.
13-3-2020 TURTLE BEECH KERALA, INDIA - TAWNY COSTER BUTTERFLY (Acraea terpsicore)
Acraea terpsicore, the tawny coster, is a small, 53–64 millimetres (2.1–2.5 in), leathery-winged butterfly common in grassland and scrub habitats. It belongs to the Nymphalidae or brush-footed butterfly family. It has a weak fluttery flight. It is avoided by most insect predators. This species and the yellow coster (Acraea issoria) are the only two Indian representatives of the predominantly African tribe Acraeini. It is found in India, Sri Lanka, Maldives to Myanmar, Thailand, Laos, Cambodia, Vietnam, Bangladesh, Singapore, and recently Australia.
This species does not fly high, but seems to keep within 3 m of the ground and tends to rest on vegetation in the regions of a meter off the ground. Acraea terpsicore can be seen in abundance wherever its larval food plant (Passiflora species) is found. The adult tends to avoid dense undergrowth and shady areas, instead keeping to open spaces in all types of vegetation.
The adult flies slowly with weak seemingly unsteady wing beats. It is one of the boldest butterflies, protected as it is from predators by a nauseous chemical. When attacked it plays dead and exudes a noxious yellowish fluid from glands in the joints of the legs. Like all butterflies protected in this manner, Acraea terpsicore has a tough exoskeleton which enables the adult to survive a few pecks of a bird or even the bites of a lizard. Once left alone the adult immediately takes off and resumes its uncaring flight.
When feeding on flowers, this butterfly is unhurried, often spending a long time sitting on the same flower. When sitting it either spreads its wings or closes them over its back the hindwings covering the forewings to a large extent. Sometimes the butterfly will not sit, but rest gently on the flower while feeding, while doing this, to maintain balance, it beats only its forewings while keeping the hindwings completely steady.
14-3-2020 TURTLE BEECH KERALA, INDIA - SCARLET SKIMMER DRAGONFLY (MALE) (Crocothemis servilia)
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The scarlet skimmer or ruddy marsh skimmer, Crocothemis servilia, is a species of dragonfly of the family Libellulidae, native to east and southeast Asia and introduced to Jamaica, Florida, and Hawaii.
It is a medium sized blood-red dragonfly with a thin black line along the mid-dorsal abdomen. Its eyes are blood-red above, purple laterally. Thorax is bright ferruginous, often blood-red on dorsum. Abdomen is blood-red, with a narrow black mid-dorsal carina. Anal appendages are blood-red. Female is similar to the male; but with olivaceous-brown thorax and abdomen. The black mid-dorsal carina is rather broad.
It breeds in ponds, ditches, marshes, open swamps and rice fields.
Tuesday, 17 March 2020
13-3-2020 TURTLE BEECH KERALA, INDIA - PLAIN TIGER BUTTERFLY (Danaus chrysippus)
Danaus chrysippus, also known as the plain tiger, African queen, or African monarch, is a medium-sized butterfly widespread in Asia, Australia and Africa. It belongs to the Danainae subfamily of the brush-footed butterfly family Nymphalidae. Danainae primarily consume plants in the genus Asclepias, more commonly called milkweed. Milkweed contains toxic compounds, cardenolides, which are often consumed and stored by many butterflies. Because of their emetic properties, the plain tiger is unpalatable to most predators. As a result, its colouration is widely mimicked by other species of butterflies. The plain tiger inhabits a wide variety of habitats, although it is less likely to thrive in jungle-like conditions and is most often found in drier, wide-open areas.
D. chrysippus encompasses three main subspecies: D. c. alcippus, D. c. chrysippus, and D. c. orientis. These subspecies are found concentrated in specific regions within the larger range of the entire species.
The plain tiger is believed to be one of the first butterflies depicted in art. A 3,500-year-old ancient Egyptian fresco in Luxor features the oldest known illustration of this species.
D. chrysippus is a medium-sized butterfly with a wingspan of about 7–8 cm (2.8–3.1 in). The body is black with white spots. The wings are a brownish orange, the upper side brighter and richer than the underside. The apical half of the forewing is black with a white band. The hindwing has three black spots in the centre. The wings are bordered in black and outlined with semicircular white spots. This species exhibits slight sexual dimorphism, as the male has large scent glands on his hindwings, which the female lacks. They appear as a large black spot with a white centre if viewed from the underside
D. chrysippus is a polymorphic species, so the exact colouring and patterning vary within and between populations.
It is similar in appearance to the Indian fritillary (Argynnis hyperbius), which may coexist with it.
The plain tiger is found across the entirety of Africa, where the predominant subspecies is D. c. alcippus. Its range extends across the majority of Asia throughout Indian subcontinent, as well as many south Pacific islands. The plain tiger is even present in parts of Australia. D. c. chrysippus is most common throughout Asia and in some select regions in Africa, while D. c. orientis is present in more tropical African regions as well as some African islands, including Madagascar and the Seychelles.It is also found in Southern Europe and Kuwait. These insects are considered bioinvaders in North America.
14-3-2020 TURTLE BEECH KERALA, INDIA - SACRED LOTUS (Nelumbo nucifera)
Nelumbo nucifera, also known as Padma (Sanskrit: पद्म, romanized: Padma, lit. 'Lotus') or Kamala (Sanskrit: कमल, lit. 'Lotus'), sacred lotus, pink lotus, Indian lotus, or simply lotus, is one of two extant species of aquatic plant in the family Nelumbonaceae. It is sometimes colloquially called a water lily, though this more often refers to members of the family Nymphaeaceae. The lotus belongs in the order Proteales.
Lotus plants are adapted to grow in the flood plains of slow-moving rivers and delta areas. Stands of lotus drop hundreds of thousands of seeds every year to the bottom of the pond. While some sprout immediately and most are eaten by wildlife, the remaining seeds can remain dormant for an extensive period of time as the pond silts in and dries out. During flood conditions, sediments containing these seeds are broken open, and the dormant seeds rehydrate and begin a new lotus colony. It is cultivated in nutrient-rich, loamy, and often flooded soils, requiring warm temperatures and specific planting depths, with propagation via rhizomes, seeds, or tissue culture, and is harvested by hand or machine for stolons, flowers, seeds, and rhizomes over several months depending on climate and variety.
It is the national flower of India and unofficially of Vietnam.
14-3-2020 TURTLE BEECH KERALA, INDIA - INDIAN POND HERON (Ardeola grayii)
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The Indian Pond Heron, known colloquially as the paddybird, is a modestly sized heron with a penchant for concealment. Its plumage is a mélange of streaked olive and brown, which serves as excellent camouflage against the marshy landscapes it frequents. However, when this bird takes flight, it reveals a striking contrast with its bright white wings, a feature that is otherwise hidden when at rest.
This stocky bird possesses a short neck and a robust, thick bill. The back is buff-brown, and during the summer, adults boast elongated neck feathers. When in flight, the Indian Pond Heron is unmistakable due to the white of its wings. It bears a resemblance to the squacco herons but is distinguished by its darker back. Observers should note that individuals may occasionally exhibit red legs during the breeding season, though this is not a common trait.
The Indian Pond Heron is often found stalking prey at the edges of small water bodies or roosting near human habitations. It is adept at utilizing floating vegetation to access deeper waters and is known to frequent marshy wetlands.
14-3-2020 TURTLE BEECH KERALA, INDIA - COMMON BARON BUTTERFLY (Euthalia aconthea)
The Common Baron (Euthalia aconthea) is a medium-sized nymphalid butterfly native to South Asia and Southeast Asia. Famous for its caterpillar’s masterclass in camouflage, this butterfly is a common sight in urban gardens and orchards.
Key Characteristics
Appearance: Sexually dimorphic. Males are dark brown with a subtle metallic sheen and small white spots. Females are paler, larger, and feature more prominent, oblique bands of white patches.
Wingspan: 50–70 mm.
Flight Pattern: Glides frequently, utilizing stiff, rapid wing beats that are rarely flapped below the horizontal plane.
Habitat & Diet
Primary Host Plant: The caterpillar feeds almost exclusively on the leaves of the mango tree (Mangifera indica).
Adult Diet: Unlike many butterflies that only seek nectar, adult Barons are strongly drawn to overripe, rotting fruits on trees or the ground. Fermenting nectar can sometimes put them into a stupor-like state.
Caterpillar CamouflageThe caterpillar is an expert in crypsis. It is bright green with a yellow dorsal stripe and feathery, branched spines.This unique structure mimics the mid-vein and lateral veins of a mango leaf perfectly, rendering the larva virtually invisible to predators.
Geographic RangeIndigenous to the Indian subcontinent (India, Sri Lanka, Nepal) and extends throughout Southeast Asia (Thailand, Malaysia, Philippines) and parts of southern China and Indonesia.
14-3-2020 TURTLE BEECH KERALA, INDIA - WESTERN CATTLE EGRET (Bubulcus ibis ssp. ibis)
The western cattle egret (Bubulcus ibis) is a species of heron (family Ardeidae) found in the tropics, subtropics and warm temperate zones. Most taxonomic authorities lump this species and the eastern cattle egret together (called the cattle egret), but some (including the International Ornithologists' Union) separate them. Despite the similarities in plumage to the egrets of the genus Egretta, it is more closely related to the herons of Ardea. Originally native to parts of Asia, Africa and Europe, it has undergone a rapid expansion in its distribution and successfully colonised much of the rest of the world in the last century.
It is a white bird adorned with buff plumes in the breeding season. It nests in colonies, usually near bodies of water and often with other wading birds. The nest is a platform of sticks in trees or shrubs. Western cattle egrets exploit drier and open habitats more than other heron species. Their feeding habitats include seasonally inundated grasslands, pastures, farmlands, wetlands and rice paddies. They often accompany cattle or other large mammals, catching insect and small vertebrate prey disturbed by these animals. Some populations of the cattle egret are migratory and others show post-breeding dispersal.
14-3-2020 CHANGARAM WETLANDS KERALA, INDIA - WESTERN REEF HERON (Egretta gularis)
The Western Reef Heron, Egretta gularis, also known as the Western Reef Egret, is a medium-sized heron exhibiting remarkable plumage polymorphism. It presents itself in two primary color forms: an all-white morph resembling the Little Egret, and a dark grey morph with a distinctive white throat. During the breeding season, both morphs develop reddish legs and facial skin, and two elongated nape feathers.
To distinguish the Western Reef Heron from similar species, observe the larger, yellower bill and the extended yellow on its thicker legs. The white morph is particularly active when foraging, often employing wing movements or shading techniques. The grey morph's whitish throat sets it apart from other herons within its range. The bill of the subspecies gularis is more pointed, while schistacea has a larger bill, especially towards the base.
This heron favors coastal environments, where it can be seen stalking or ambushing its prey in shallow waters.
The Western Reef Heron is found along the coasts of southern Europe, Africa, and parts of Asia. The subspecies gularis inhabits West Africa to Gabon, with some populations breeding in southern Europe. Subspecies schistacea ranges from the Persian Gulf to the eastern coast of India.
The Western Reef Heron exhibits dynamic foraging behavior, including running through shallow waters, stirring the water with its feet, or using its wings to disturb prey. It is also known to stand motionless, waiting to ambush its next meal.
This species is not particularly vocal, but it does emit a low "kwok" or grating sounds when disturbed or near its nesting site.
Breeding habitats are coastal wetlands. The heron nests in colonies, often on platforms of sticks in trees or shrubs. The usual clutch consists of three to four light blue eggs, with both parents sharing incubation duties.
The Little Egret (Egretta garzetta) is similar in appearance, especially the white morph of the Western Reef Heron. However, the Little Egret has a slimmer bill and lacks the yellow leg extensions seen in the Western Reef Heron.
The diet primarily includes fish, crustaceans, and molluscs. In coastal areas, mudskippers are a regular part of their diet.
The IUCN lists the Western Reef Heron as Least Concern, indicating a stable population without significant immediate threats to its survival.
14-3-2020 CHANGARAM WETLANDS KERALA, INDIA - LITTLE EGRET (Egretta garzetta)
The Little Egret, Egretta garzetta, is a dainty heron adorned in pure white plumage. It is characterized by a slender black beak, long black legs, and, notably in the western race, yellow feet. This elegant bird is a sight to behold with its graceful neck and poised stance.
Adult Little Egrets measure between 55–65 cm in length with a wingspan of 88–106 cm, and weigh 350–550 g. Their plumage is predominantly white, though some may exhibit bluish-grey coloration. Breeding adults boast ornate nape plumes reaching about 150 mm, along with distinctive feathers on the breast and elongated scapulars.
The bill and lores are black, with greenish-grey skin at the base of the lower mandible and around the eye, which houses a yellow iris. Legs are black with contrasting yellow feet, though juveniles may have greenish-black legs and duller feet. The subspecies E. g. nigripes is distinguished by yellow skin between the bill and eye, and blackish feet.
14-3-2020 CHANGARAM WETLANDS KERALA, INDIA - LITTLE CORMORANT (Microcarbo niger)
The Little Cormorant, Microcarbo niger, is a dainty member of the cormorant family, measuring about 50 centimeters in length. In its breeding attire, it boasts a sleek, all-black plumage adorned with white spots and delicate filoplumes on its face, and a modest crest on the back of its head. The non-breeding or juvenile birds display a more subdued brownish plumage, with a small, distinct white patch on the throat.
Distinguishable from the slightly larger Indian Cormorant by its shorter beak and absence of a peaked head, the Little Cormorant has dark eyes and facial skin. Males and females appear similar, though males are generally larger. A rare silvery-grey plumage has been noted in some individuals.
The Little Cormorant frequents a variety of freshwater bodies, from diminutive village ponds to expansive lakes, and occasionally coastal estuaries.
14-3-2020 CHANGARAM WETLANDS KERALA, INDIA - INDIAN POND HERON (Ardeola grayii)
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The Indian Pond Heron, known colloquially as the paddybird, is a modestly sized heron with a penchant for concealment. Its plumage is a mélange of streaked olive and brown, which serves as excellent camouflage against the marshy landscapes it frequents. However, when this bird takes flight, it reveals a striking contrast with its bright white wings, a feature that is otherwise hidden when at rest.
This stocky bird possesses a short neck and a robust, thick bill. The back is buff-brown, and during the summer, adults boast elongated neck feathers. When in flight, the Indian Pond Heron is unmistakable due to the white of its wings. It bears a resemblance to the squacco herons but is distinguished by its darker back. Observers should note that individuals may occasionally exhibit red legs during the breeding season, though this is not a common trait.
The Indian Pond Heron is often found stalking prey at the edges of small water bodies or roosting near human habitations. It is adept at utilizing floating vegetation to access deeper waters and is known to frequent marshy wetlands.
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This heron has its origins in the Old World, with a breeding range that extends from southern Iran across the Indian subcontinent to Burma and Sri Lanka. It is a widespread and common species, yet its cryptic coloration often renders it invisible until it is nearly underfoot.
Typically solitary in its foraging habits, the Indian Pond Heron may gather in numbers during the dry season when prey is concentrated in shrinking wetlands. It is a semi-colonial breeder and has been observed foraging in diverse environments, including garbage heaps and well-watered lawns. The bird's tendency to allow close approaches by humans is notable, and it may form communal roosts in urban areas.
The Indian Pond Heron is generally a silent bird, but it may emit a harsh croak when alarmed or near its nesting sites.
The onset of the monsoons marks the beginning of the breeding season for these herons. They nest in small colonies, often alongside other wading birds, constructing platforms of sticks in trees or shrubs. The nests are typically built at heights of 9 to 10 meters. The male collects materials while the female assembles the nest. Clutches usually consist of three to five eggs, which hatch asynchronously after 18 to 24 days. Both parents are involved in feeding the young, primarily with fish.
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The Indian Pond Heron is similar to the squacco heron but can be differentiated by its darker back. To the east of its range, it is replaced by the Chinese Pond Heron.
The diet of the Indian Pond Heron is varied, including crustaceans, aquatic insects, fishes, tadpoles, and occasionally leeches. Outside of wetlands, these herons will also consume terrestrial insects, fish, and amphibians. They have been observed using innovative techniques such as bait-fishing with bread crumbs to attract fish.
The IUCN Red List classifies the Indian Pond Heron as Least Concern, indicating that the species does not currently face a significant risk of extinction.
The Indian Pond Heron's habit of remaining motionless until the last possible moment has given rise to several folk beliefs about its vision. In Sri Lanka, it is referred to as the "half-blind heron," and in Hindustani, the phrase "bagla bhagat" likens the bird to a wolf in sheep's clothing. The bird has also featured in Indian folklore and literature, often noted for its surprising transformation from dull to bright colors upon taking flight.
14-3-2020 CHANGARAM WETLANDS KERALA, INDIA - BLACK DRONGO (Dicrurus macrocercus)
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The black drongo (Dicrurus macrocercus) is a small Asian passerine bird of the drongo family Dicruridae. It is a common resident breeder in much of tropical southern Asia from southwest Iran through Pakistan, India, Bangladesh and Sri Lanka east to southern China and Indonesia and accidental visitor of Japan. It is an all black bird with a distinctive forked tail and measures 28 cm (11 in) in length. It feeds on insects, and is common in open agricultural areas and light forest throughout its range, perching conspicuously on a bare perch or along power or telephone lines.
The species is known for its aggressive behaviour towards much larger birds, such as crows, never hesitating to dive-bomb any bird of prey that invades its territory. This behaviour earns it the informal name of king crow. Smaller birds often nest in the well-guarded vicinity of a nesting black drongo. Previously grouped along with the African fork-tailed drongo (Dicrurus adsimilis), the Asian forms are now treated as a separate species with several distinct populations.
Sunday, 15 March 2020
15-3-2020 DUBAI, UAE - DESERT WHEATEAR (FEMALE) (Oenanthe deserti)
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The desert wheatear (Oenanthe deserti) is a wheatear, a small passerine bird that was formerly classed as a member of the thrush family Turdidae, but is now more generally considered to be an Old World flycatcher (Muscicapidae). It is a migratory insectivorous species, 14.5 to 15 cm (5.7 to 5.9 in) in length. Both western and eastern forms of the desert wheatear are rare vagrants to western Europe. The western desert wheatear breeds in the Sahara and the northern Arabian peninsula. The eastern race is found in the semi-deserts of Central Asia and in winter in Pakistan and northeast Africa.
The plumage of the upper parts of the male in summer is buff. The underparts are white with a buff tinge on the breast. The black on the face and throat extends to the shoulders, and there is distinct white superciliary stripe. The female is greyer above and buffer below and has no black on the throat, and in the winter plumage the black on the throat of the male is partially obscured by the white tips of the feathers. A distinguishing characteristic, in both sexes of all ages, is that the entire tail is black to the level of the upper tail-coverts.
The desert wheatear feeds largely on insects which it picks up off the ground. It breeds in the spring when a clutch of usually four pale blue, slightly speckled eggs is laid in a well-concealed nest made of grasses, mosses and stems.
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