Thursday, 11 June 2020
Wednesday, 10 June 2020
10-6-2020 CREU DE LONGA, VALENCIA - AUDOUIN'S GULL (Ichthyaetus audouinii)
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The Audouin's gull, Ichthyaetus audouinii, presents itself as a large gull species, predominantly inhabiting the Mediterranean, the western coast of Saharan Africa, and the Iberian Peninsula. Its name pays homage to the French naturalist Jean Victoire Audouin. Resembling a small European herring gull, the adult Audouin's gull is distinguished by its short, stubby red bill and the unique "string of pearls" white wing primary tips. The legs of this bird are a subtle grey-green, and it takes a full four years for the gull to don its adult plumage.
When observing the Audouin's gull, one should note the red bill and the distinctive pattern of white spots along the wingtips, which contrast with the larger "mirrors" seen in other gull species. These features are key to distinguishing it from its relatives.
This gull favors coastal and pelagic environments, strictly adhering to regions where it can pursue its specialized diet.
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The Audouin's gull is found in the Mediterranean, along the western Saharan African coast, and on the Iberian Peninsula. It breeds on small islands, either colonially or in solitude.
Once considered one of the world's rarest gulls, the Audouin's gull has established new colonies but remains a rare sight with a population of around 10,000 pairs. This bird is not known to wander far from its breeding grounds, though occasional records exist of it appearing as far afield as the Netherlands, England, and even Trinidad.
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Unlike many of its kin, the Audouin's gull does not scavenge but is a specialist fish eater. It feeds at night, often far out to sea, and also patrols beaches, occasionally dipping its legs into the water to create drag, aiding in its hunting technique.
The Audouin's gull breeds on small islands, laying 2-3 eggs in a ground nest. It has been known to breed both in colonies and as solitary pairs.
The Audouin's gull is currently classified as Vulnerable according to the IUCN Red List. It is also one of the species protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA).
10-6-2020 CREU DE LONGA, VALENCIA - PURPLE HERON (Ardea purpurea)
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The Purple Heron (Ardea purpurea), a statuesque avian, stands with a height ranging from 70 to 94 cm and boasts a wingspan of 120 to 152 cm. Despite its grand stature, it is a slender creature, tipping the scales at a mere 0.5 to 1.35 kg. This bird is slightly smaller and more svelte than its cousin, the Grey Heron, and is adorned with darker, reddish-brown plumage.
Adult Purple Herons are distinguished by their black foreheads and crowns, with a dark stripe cascading down the back of the neck, culminating in a modest, dangling crest. Their heads and necks are a buffish chestnut, streaked with dark lines, while the mantle dons an oily brown hue. The upper parts and tail are a brownish grey, and the underparts are a mix of chestnut and black. During the breeding season, the beak of the adult brightens, and the eyes gleam with a yellow iris.
The Purple Heron is a denizen of marshes, lagoons, and lakes, often shrouded by dense vegetation. It has a penchant for freshwater habitats, particularly those with expansive reed beds of Phragmites. Coastal mangrove swamps are also within its realm, though less frequently visited.
This heron has a broad range that spans Africa, central and southern Europe, and the southern and eastern Palearctic. While the Western Palearctic populations are migratory, their African and tropical-Asian counterparts are mostly sedentary, save for occasional dispersive movements.
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The Purple Heron is a creature of stealth and grace, often retreating to the sanctuary of reed beds. It exhibits a slow, deliberate flight, with its neck retracted and legs trailing behind. On land, it moves with long toes that allow it to traverse floating vegetation or even bushwalk without grasping the branches. Dawn and dusk are its preferred times for activity, with the bird often seen stalking or standing in ambush for its prey.
The heron's vocalization is a subdued "frarnk," a quieter and higher-pitched affair compared to the Grey Heron. It is generally less vocal, but similar guttural sounds may emanate from its colonies.
Purple Herons are colonial breeders, constructing bulky nests from dead reeds or sticks in close proximity to water. They lay about five bluish-green eggs, with both parents sharing incubation duties. The young emerge after approximately four weeks and take their first flight six weeks later.
A versatile predator, the Purple Heron's diet includes fish, rodents, frogs, insects, and more. It employs both stalking and ambush tactics to capture its prey, often waiting motionlessly or slowly stalking its victim.
10-6-2020 ULLAL DE BOLDOVI, VALENCIA - CABBAGE WHITE BUTTERFLY (Pieris rapae)
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Pieris rapae is a small- to medium-sized butterfly species of the whites-and-yellows family Pieridae. It is known in Europe as the small white, in North America as the cabbage white or cabbage butterfly, on several continents as the small cabbage white, and in New Zealand as the white butterfly. The butterfly is recognizable by its white color with small black dots on its wings, and it can be distinguished from P. brassicae by its larger size and the black band at the tip of its forewings.
The caterpillar of this species, often referred to as the "imported cabbageworm", is a pest to crucifer crops such as cabbage, kale, bok choy and broccoli. Pieris rapae is widespread in Europe and Asia; it is believed to have originated in the Eastern Mediterranean region of Europe, and to have spread across Eurasia thanks to the diversification of brassicaceous crops and the development of human trade routes.
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Over the past two centuries, it spread to North Africa, North America, New Zealand, and Australia, as a result of accidental introductions.
The species has a natural range across Europe, Asia, and North Africa. It was accidentally introduced to Quebec, Canada, around 1860 and spread rapidly throughout North America. The species has spread to all North American life zones from Lower Austral/Lower Sonoran to Canada. Estimates show that a single female of this species might be the progenitor in a few generations of millions. It is absent or scarce in desert and semidesert regions (except for irrigated areas). It is not found north of Canadian life zone, nor on Channel Islands off the coast of southern California. By 1898, the small white had spread to Hawaii; by 1929, it had reached New Zealand and the area around Melbourne, Australia, and found its way to Perth as early as 1943. It does not seem to have made it to South America.
Tuesday, 9 June 2020
9-6-2020 MONTE CORONA, VALENCIA - COASTAL PEARL MOTH (Mecyna asinalis)
Mecyna asinalis, sometimes known as the madder pearl, is a species of moth of the family Crambidae found in Europe.
The wingspan is 25–29 millimetres (0.98–1.14 in). The forewings are grey; lines darker, first indistinct, sometimes followed by a dark fuscous triangular subdorsal spot, second sometimes blackish -dotted, curved, with a deep abrupt sinuation inwards below middle, often preceded by a brownish or dark fuscous trapezoidal subdorsal spot; very large orbicular, and reniform discal spot somewhat paler, latter preceded and followed by faint brownish sometimes dark-edged spots. Hind are wings grey; a darker postmedian line. The larva is yellow-brownish; dorsal line reddish-brown; subdorsal broader, brown; lateral brown; spots black.
The moth flies from May to October in two generations per year.
The larvae graze the leaves of the foodplant eating the parenchyma and leaving a ″window″ in the upper epidermis. Foodplants include taupata (Coprosma repens), crosswort (Crucianella maritima) and wild madder (Rubia peregrina).
It is found in west and southern Europe, including Ireland, Britain, the Iberian Peninsula, France, Germany, Switzerland, Italy, Albania, Croatia, Greece and Sicily, Sardinia, Malta, Madeira, Corsica, the Azores and the Canary Islands.
Monday, 8 June 2020
7-6-2020 MONTE CORONA, VALENCIA - WAVE MOTH (Idaea ostrinaria)
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Idaea ostrinaria (Coral-bordered Wave) is a small geometrid moth found in European, Mediterranean, and Western Asian xerophilous (dry) habitats, typically at 0–800m altitude. It features a characteristic coral-red bordered wing and is polyphagous, with larvae feeding on withered foliage and detritus from herbaceous plants like thyme (Thymus) and heliotrope (Heliotropium).
Key Facts about Idaea ostrinaria:
Scientific Classification: Belongs to the order Lepidoptera, family Geometridae, and subfamily Sterrhinae.
Habitat: Prefers dry, coastal areas, and warm, open landscapes.
Appearance: Known for its reddish or "coral-bordered" wing markings, often featuring a delicate, pale, or brownish-grey ground color.
Larval Diet: Polyphagous, meaning they eat a variety of plants, including Labiatae (mint family), Boraginaceae, Campanulaceae, Convolvulaceae, and Caryophyllaceae.
Range: Primarily found in South-West Europe, the Mediterranean region, and parts of Western Asia.
Flight Season: Frequently observed in late spring and summer months (e.g., June sightings).
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