Sunday, 30 August 2020
28-8-2020 RACO DE OLLA, VALENCIA - CURLEW SANDPIPER (Calidris ferruginea)
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The Curlew Sandpiper, Calidris ferruginea, is a small, elegant wader known for its remarkable transformation from the pale grey and white winter plumage to the rich, brick-red underparts of the breeding season. With a length of 18–23 cm and a wingspan of 38–41 cm, it is similar in size to the Dunlin but can be distinguished by its longer, down-curved bill, more elongated neck and legs, and the distinctive white rump that is visible in flight.
In breeding plumage, the adult Curlew Sandpiper sports patterned dark grey upperparts with a striking rusty hue below. During the non-breeding season, it adopts a more subdued appearance with pale grey upperparts and a clean white underside, complemented by a conspicuous white supercilium. Juveniles are characterized by a grey and brown back, white belly, and a peach-coloured breast. The species' elegant, down-curved bill and longer legs are key identification features throughout the year.
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The Curlew Sandpiper breeds on the tundra of Arctic Siberia, preferring the edges of marshes or pools, or dry patches of tundra.
A strongly migratory bird, the Curlew Sandpiper winters mainly in Africa, with populations also found in south and southeast Asia, Australia, and New Zealand. It is an occasional vagrant to North America.
This species is highly gregarious, often forming flocks with other calidrid waders, especially Dunlins. Despite its easterly breeding range, it is regularly observed on passage in western Europe, likely due to a southwesterly migration route.
The Curlew Sandpiper's vocalizations include a soft "chirrup" often heard during its aerial courtship display.
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The breeding season spans from June to late August. Males perform impressive aerial displays to attract mates. Nests are located near marshes or pools, with an average clutch size of 3.8 eggs. Incubation is solely by the female and lasts 19–20 days, with chicks being cared for by the female for 14–16 days post-hatching.
The Curlew Sandpiper can be confused with the Dunlin but can be differentiated by its longer bill, neck, and legs, as well as its white rump and different seasonal plumage.
Foraging primarily in soft mud on marshes and coasts, the Curlew Sandpiper feeds on insects and other small invertebrates, which it picks up by sight.
The Curlew Sandpiper is currently classified as Near Threatened by the IUCN. Population trends indicate a decline, particularly noted in South Africa and Australia, which may be linked to the effects of global warming on its breeding grounds. The species is protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA).
Saturday, 29 August 2020
Friday, 28 August 2020
28-8-2020 MONTE CORONA, VALENCIA - SARDINIAN WARBLER (FEMALE) (Sylvia melanocephala)
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The Sardinian warbler, Curruca melanocephala, presents itself as a charming and distinctive bird of the Mediterranean. The males are adorned with a sleek grey back and pristine whitish underparts, crowned with a striking black head, a pure white throat, and captivating red eyes. The females, on the other hand, exhibit a more subdued palette, with brown upperparts and buff underparts, complemented by a subtle grey head.
When attempting to identify the Sardinian warbler, look for the male's black head and red eyes, which contrast with the white throat and grey back. Females can be recognized by their brown and buff coloration with a greyish head. The variability in plumage, including the presence or absence of a reddish hue, can be a helpful clue in distinguishing between subspecies.
This typical warbler favors open landscapes and cultivated areas, where it can find bushes suitable for nesting. Its preference for such environments makes it a familiar sight in the Mediterranean countryside.
The Sardinian warbler is a resident of the southernmost regions of Europe, extending its range into Asia in Turkey and the eastern Mediterranean. While not extensively migratory, some individuals do venture to North Africa for the winter, and the species has been known to appear as a vagrant as far as Great Britain.
28-8-2020 CREU DE LONGA, VALENCIA - GREY HERON (Ardea cinerea)
The Grey Heron (Ardea cinerea) is a statuesque wading bird belonging to the family Ardeidae. It is a familiar sight in both rural and urban settings, often seen standing stoically along the water's edge. An adult Grey Heron is a large bird, reaching up to 100 cm in height, with a wingspan between 155 to 195 cm. It weighs between 1 to 2 kg. The plumage is predominantly ashy-grey above, with a greyish-white underbelly and some black on the flanks. A striking feature is the white head and neck adorned with a broad black stripe that extends from the eye to the black crest. The beak is pinkish-yellow, long, and sharply pointed, while the legs are a brown hue.
When identifying the Grey Heron, look for the white head with the black supercilium and crest, the long grey neck, and the ashy-grey wings and back. The underparts are lighter, and the legs are long and brown. Juveniles can be distinguished by their duller grey neck and smaller crest. The beak is a useful indicator of age, being brighter in breeding adults.
Grey Herons are highly adaptable and can be found in a variety of watery habitats including lakes, rivers, ponds, marshes, and coastal environments. They require shallow waters for foraging or areas with shelving margins where they can wade.
Native to temperate Europe and Asia, as well as parts of Africa, the Grey Heron has a broad range. Northern populations may migrate southwards in autumn, while others remain resident year-round. Vagrant sightings have occurred in the Caribbean, Bermuda, and parts of North America.
The Grey Heron exhibits a slow, deliberate flight with its neck retracted in an S-shape. It is known for its solitary foraging habits, often standing motionless or stalking prey through shallow waters. It is also a communal rooster, often found in trees or cliffs at night.
The primary call of the Grey Heron is a loud croaking "fraaank." At breeding colonies, a variety of guttural and raucous noises can be heard, including greeting calls between mates and alarm calls when predators are nearby.
Breeding takes place in colonies, or heronries, typically in high trees near water. Nests are reused and added to each year. The breeding season sees a clutch of three to five bluish-green eggs laid, which both parents incubate. Chicks fledge at 7-8 weeks old.
Grey Herons are apex predators within their ecosystem, feeding on a variety of aquatic creatures such as fish, amphibians, crustaceans, and insects. They have also been known to consume small mammals and juvenile birds.
28-8-2020 MONTE CORONA, VALENCIA - BLACK PINE SAWYER BEETLE (Monochamus galloprovincialis)
Monochamus galloprovincialis, the pine sawyer beetle, also referred to as the black pine sawyer beetle, is a species of beetle in the family Cerambycidae. It was described by Olivier in 1795, originally under the genus Cerambyx. It has a wide distribution, occurring naturally throughout Europe and the Caucasus. It has also been introduced into the Canary Islands. It serves as a vector for the parasitic nematode species Bursaphelenchus xylophilus, and also acts as a host to the parasitoid wasp species Dolichomitus tuberculatus.
Adult beetles are strong fliers, and in flight mill experiments were, on average, able to fly 16 km over the lifetime of the beetle. The adult male produces an aggregation pheromone to attract females.
Thursday, 27 August 2020
27-8-2020 MONTE CORONA, VALENCIA - MEDITERRANEAN SPINY FALSE WOLF SPIDER (Zoropsis spinimana)
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Males of Z. spinimana reach a length around 10–12 mm (0.39–0.47 in), while females are 15–18 mm (0.59–0.71 in) long. This spider resembles a wolf spider, as its eyes are of the same configuration, but unlike wolf spiders, the eyes of Zoropsis spiders are more spread out along the front third of the cephalothorax. The front body (prosoma) is brownish with broad darker markings. The abdomen (opisthosoma) has median black markings. The legs are mainly a speckled brown color.
The brown and light marking on the upper side of the front body evokes the face of the vampire of the 1922 German silent film Nosferatu, which led to the common German name of the spider, Nosferatu-Spinne.
Zoropsis spinimana is distributed widely in the Mediterranean, but reaches into Russia, and was introduced to the United States, primarily in the San Francisco Bay Area, and the United Kingdom, primarily the London area.
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