TOTAL PAGEVIEWS

TRANSLATE

Monday 23 September 2024

22-4-2016 MONTE CORONA - COAL TIT (Periparus ater)

The Coal tit (Periparus ater) is a small passerine bird widespread and common resident breeder throughout the temperate to subtropical Palearctic, including North Africa.

The Coal tit has a distinctive large white nape spot on its black head. The head, throat, and neck of the adult are glossy blue-black, setting off the off-white sides of the face (tinged grey to yellow depending on subspecies) and the brilliant white nape; the white tips of the wing coverts appear as two wingbars. The underparts are whitish shading through buff to rufous on the flanks. The bill is black, the legs lead-colored, and the irides dark brown. The young birds are duller than the adults, lacking gloss on the black head, and with the white of nape and cheeks tinged with yellow.

Population size
90-165 Mlnlnn
Life Span
2-4 years
Weight
8-10
goz
g oz 
Length
10-11.5
cminch
cm inch 
Wingspan
17-21
cminch
cm inch 

Coal tits are found throughout Europe, Asia, and North Africa. They are all-year residents throughout almost all range, making only local movements in response to particularly severe weather; only the Siberian birds have a more regular migration. Coal tits prefer humid conifer forests but also frequent shrubland, conifer plantations, gardens, and urban areas.


Coal tits are social birds and often form small flocks in winter with other tits. They resemble other tits in acrobatic skill and restless activity, though they more frequently pitch on a trunk, and in little hops resemble a treecreeper. Coal tits are active during the day spending most of their time searching for food trees. They also visit gardens to feed on a variety of foods put out, particularly sunflower seeds. While searching for food, Coal tit flocks keep contact with incessant short 'dee' or 'see-see' calls. Their song is a strident 'if-he, if-he, if-he', heard most frequently from January to June, but also in autumn. The song resembles that of the Great tit, but much faster and higher in pitch. North African birds also have a 'currr' call similar to that of the European crested tit which is not found in Africa.

Coal tits breed once per year between March and late July. They prefer to nest in a hole in a rotting tree stump, often low down, and the nest is deep within the hole; holes in the ground, burrows of mice or rabbits, chinks between the stones in walls, old nests of Pica magpies or other large birds, and squirrel dreys are also occupied. The materials, moss, hair, and grass, are closely felted together, and rabbit fur or feathers are added for the lining. The female lays 7 to 11 red-spotted white eggs and incubates them for 14-16 days. The chicks hatch blind and helpless and remain in the nest for about 14 to 19 days.

Sunday 22 September 2024

22-9-2024 MONTE CORONA, VALENCIA - OLEANDER SEED BUG (Caenocoris nerii)


Caenocoris nerii, common name oleander seedbug, is a species of ground bugs in the insect family Lygaeidae.

The species name nerii refers to the main host plant Nerium oleander.

This species is present in part of Europe (Albania, Bulgaria, Cyprus, France, Greece, Italy and Spain), in the Afrotropical realm and in the Indomalayan realm.

Caenocoris nerii can reach a length of about 7.5–9.5 millimetres (0.30–0.37 in). The female is larger than the male. Bodies are elongated. The basic color of the body is black, with red markings. Two red quadrangular patches are present on the head. Two red markings appear on the shoulders of pronotum and at the inner margins of the hemielytra, which only partially cover the membranous blackish wings. Scutellum and abdomen are completely red.

Females usually lay eggs on the leaves of Nerium oleander (hence the common name of the species). All stages of nymphs suck almost exclusively the milky juice of the main host plant (Nerium oleander), but they may also feed on Asclepiadaceae species. Nynphs overwinter. Adults normally feed on the Oleander's fruits and seed. These aposematic bugs are usually rejected by predators because of their toxins derived from the host plant.

22-9-2024 ALBUFERA, VALENCIA - RED SWAMP CRAYFISH (Procambarus clarkii)


 Procambarus clarkii, known variously as the red swamp crayfish, Louisiana crawfish or mudbug, is a species of cambarid crayfish native to freshwater bodies of northern Mexico, and southern and southeastern United States, but also introduced elsewhere (both in North America and other continents), where it is often an invasive pest.

P. clarkii is typically dark red, with long claws and head, small or no spines on the sides of its carapace just below the head, and rows of bright red bumps on the front and side of the first leg.

The native range of P. clarkii is from northern Mexico and far southeastern New Mexico, through the Gulf States to the Florida Panhandle, as well as inland north through the Mississippi Basin to southern Illinois. It has also been introduced, sometimes deliberately, outside its natural range to countries in Asia, Africa, Europe and elsewhere in the Americas. In northern Europe, the populations are self-maintaining but not expanding, while in southern Europe, P. clarkii is multiplying and actively colonizing new territories at the expense of the native crayfish, Astacus astacus and Austropotamobius spp. Individuals are reported to be able to cross many miles of relatively dry ground, especially in wet seasons, although the aquarium trade and anglers may have hastened the spread in some areas (anglers using P. clarkii as fishing bait are thought to have introduced it to the state of Washington). Attempts have also been made to use P. clarkii as a biological control organism, to reduce levels of the snails involved in the lifecycle of schistosomiasis, leading to the dispersal of P. clarkii in, for instance, Kenya.

In Europe, P. clarkii is included since 2016 in the list of Invasive Alien Species of Union concern (the Union list). This implies that this species cannot be imported, bred, transported, commercialized, or intentionally released into the environment in the whole of the European Union.

22-9-2024 MONTE CORONA, VALENCIA - KIRBY'S DROPWING DRAGONFLY (MALE) (Trithemis kirbyi),


Trithemis kirbyi, also known as the Kirby's dropwing[1], orange-winged dropwing, or scarlet rock glider is a species of dragonfly in the family Libellulidae.

It is found in Algeria, Angola, Benin, Botswana, Burkina Faso, Chad, Comoros, the Democratic Republic of the Congo, Ivory Coast, Egypt, Ethiopia, Gambia, Ghana, Guinea, Kenya, Liberia, Madagascar, Malawi, Morocco, Mozambique, Namibia, Nigeria, Senegal, Somalia, South Africa, Sudan, Tanzania, Togo, Uganda, Western Sahara, Zambia, Zimbabwe, and possibly Burundi. It is also present in southern Europe, the Arabian Peninsula, the Indian Ocean Islands and South Asia to India.

Since 2003 this African tropical dragonfly has been colonizing Europe helped by a widespread increase in temperatures. It is now breeding successfully in Spain, Portugal and France.

The adult male abdomen measures 21–24 mm and hind wing 24–27 mm. Female abdomen measures 23 mm and hind wing 26–30 mm. The male is a medium-sized scarlet dragonfly with a broad reddish amber patch on the base of transparent wings. The female is similar to the male, but duller in color.[3] Its natural habitats are subtropical or tropical streams and rivers. It breeds in marshes, ponds, and lakes, and prefers to perch on exposed rocks, dry areas, and boulders in riverbeds.

22-9-2024 CREU DE LONGA, ALBUFERA - ZITTING CISTICOLA (Cisticola juncidis)

The zitting cisticola or streaked fantail warbler (Cisticola juncidis ) is a widely distributed Old World warbler whose breeding range includes southern Europe, Africa (outside the deserts and rainforest), and southern Asia down to northern Australia. A small bird found mainly in grasslands, it is best identified by its rufous rump; as well, it lacks any gold on the collar and the brownish tail is tipped with white. During the breeding season, males have a zigzagging flight display accompanied by regular "zitting" calls that have been likened to repeated snips of a scissor. They build their pouch nest suspended within a clump of grass.

The zitting cisticola is 10 to 12 cm (3.9 to 4.7 in) in length. It is brown above, heavily streaked with black markings. The underparts are whitish, and the tail is broad, white-tipped and flicked frequently, giving rise to the alternative name for the species. The adult males have less crown streaking and more back marking than the females, but there are no great difference between the sexes or the eighteen geographical races. The absence of a nuchal collar separate it from the golden-headed cisticola (Cisticola exilis ). In the non-breeding season, they tend to skulk within the grass and can be hard to spot.

This species is found mainly in grassland habitats, often near water. Most populations are resident, but some East Asian populations migrate south to warmer areas in winter. In the Himalayas, they ascend to about 1,900 m (6,200 ft) during summer but are below 1,300 m (4,300 ft) in the winter. This species is a rare vagrant to northern Europe, mostly as a spring overshoot. Its European range is generally expanding, although northern populations are especially susceptible to hard winters.

Zitting cisticolas are very small insectivorous birds, sometimes found in small groups. The breeding season is associated with the rains. Two broods a year occur in many regions. Males are generally polygynous, but some are monogamous. The male builds the initial nest structure deep in the grasses, and invites females using a special display. Females that accept the male complete the nest. The nest is made by binding living leaves into the soft fabric of felted plant-down, cobwebs, and grass. The zitting cisticola's nest is a cup shape with a canopy of tied-together leaves or grasses overhead for camouflage; 3–6 eggs are laid. The female incubates the egg. The eggs hatch after about 10 days. More than one brood may be raised. Females change their mates frequently and rarely stay within the same territory, while males are less mobile, maintaining non-overlapping song-territories which shift from day to day. Females can sometimes breed in their first year.

22-9-2024 ALBUFERA, VALENCIA - GREATER FLAMINGO (Phoenicopterus roseus)


The Greater flamingo (Phoenicopterus roseus) is the most widespread and largest species of the flamingo family. It was described by Peter Simon Pallas in 1811. The Greater flamingo was previously thought to be the same species as the American flamingo, but because of coloring differences of its head, neck, body, and bill, the two flamingos are now most commonly considered separate species.

Population size
550-680 Thou
Life Span
40-60years
Top speed
59
km/hmph
km/h mph 
Weight
2-4
kglbs
kg lbs 
Height
110-150
cminch
cm inch 
Length
80-150
cminch

Greater flamingos have an attractive coloration and appearance. Their feathers are pinkish/white, the wing coverts are red and the primary and secondary flight feathers are black. They have long pink bills with a black tip, yellow eyes and long pink legs. The male is bigger than the female, and juveniles have a gray-brown coloration, with some pink on their underparts, tail and wings, with the legs and beak being mainly brown.

The Greater flamingo inhabits Africa, the Middle East, southern Europe, and the Indian subcontinent. They occur in relatively shallow water bodies, such as saline lagoons, salt pans, large alkaline or saline lakes, and estuaries. Breeding takes place on sandbanks, mudflats, sandy or rocky islands, or open beaches.

22-9-2024 ALBUFERA, VALENCIA - COMMON RINGED PLOVER (JUVENILE) (Charadrius hiaticula)


The common ringed plover or ringed plover (Charadrius hiaticula ) is a small plover that breeds in Arctic Eurasia. The genus name Charadrius is a Late Latin word for a yellowish bird mentioned in the fourth-century Vulgate. It derives from Ancient Greek kharadrios a bird found in ravines and river valleys (kharadra, "ravine"). The specific hiaticula is Latin and has a similar meaning to the Greek term, coming from hiatus, "cleft" and -cola, "dweller" (colere, "to dwell").

Adults are 17–19.5 cm (6.7–7.7 in) in length with a 35–41 cm (14–16 in) wingspan. They have a grey-brown back and wings, a white belly, and a white breast with one black neckband. They have a brown cap, a white forehead, a black mask around the eyes and a short orange and black bill. The legs are orange and only the outer two toes are slightly webbed, unlike the slightly smaller but otherwise very similar semipalmated plover, which has all three toes slightly webbed, and also a marginally narrower breast band; it was in former times included in the present species. Juvenile ringed plovers are duller than the adults in colour, with an often incomplete grey-brown breast band, a dark bill and dull yellowish-grey legs.

22-9-2024 ALBUFERA, VALENCIA - COMMON RINGED PLOVER (Charadrius hiaticula)

The common ringed plover or ringed plover (Charadrius hiaticula ) is a small plover that breeds in Arctic Eurasia. The genus name Charadrius is a Late Latin word for a yellowish bird mentioned in the fourth-century Vulgate. It derives from Ancient Greek kharadrios a bird found in ravines and river valleys (kharadra, "ravine"). The specific hiaticula is Latin and has a similar meaning to the Greek term, coming from hiatus, "cleft" and -cola, "dweller" (colere, "to dwell").

Adults are 17–19.5 cm (6.7–7.7 in) in length with a 35–41 cm (14–16 in) wingspan. They have a grey-brown back and wings, a white belly, and a white breast with one black neckband. They have a brown cap, a white forehead, a black mask around the eyes and a short orange and black bill. The legs are orange and only the outer two toes are slightly webbed, unlike the slightly smaller but otherwise very similar semipalmated plover, which has all three toes slightly webbed, and also a marginally narrower breast band; it was in former times included in the present species. Juvenile ringed plovers are duller than the adults in colour, with an often incomplete grey-brown breast band, a dark bill and dull yellowish-grey legs.


This species differs from the smaller little ringed plover in leg colour, the head pattern, and the lack of an obvious yellow eye-ring.

These birds forage for food on beaches, tidal flats and fields, usually by sight. They eat insects, crustaceans and worms.

The common ringed plover's breeding habitat is open ground on beaches or flats across northern Eurosiberia and in Arctic northeast Canada. Some birds breed inland, and in western Europe they nest as far south as northern France. They nest on the ground in an open area with little or no plant growth.

If a potential predator approaches the nest, the adult will walk away from the scrape, calling to attract the intruder and feigning a broken wing. Once the intruder is far enough from the nest, the plover flies off.

Common ringed plovers are migratory and winter in coastal areas south to Africa. In Norway, geolocators have revealed that adult breeding birds migrate to West Africa. Many birds in Great Britain and northern France are resident throughout the year.

22-9-2024 ALBUFERA, VALENCIA - WESTERN YELLOW WAGTAIL (Motacilla flava)

The Western yellow wagtail (Motacilla flava) is a small songbird that can be found in Europe, Asia, and Africa. Its common name comes from characteristic tail-pumping behavior and the part of its scientific name 'flava' means 'golden-yellow' from Latin.

Population size
64-107Mln
Life Span
8 years
Weight
11-26
goz
g oz 
Length
15-16
cminch
cm inch 

Western yellow wagtails breed in much of temperate Europe and Asia. Populations in the milder parts, such as western Europe, are resident but northern and eastern populations migrate to Africa and south Asia. Western yellow wagtails prefer open country near water, such as wet meadows, marshes, bogs, pastures near water, damp steppe, and grassy tundra.

Outside of the breeding season, Western yellow wagtails are gregarious and often spend time in flocks. They also gather in large numbers on the night roosts and migrate in flocks. Western yellow wagtails are active during the day spending their time in search of food. They forage by walking on the ground picking insects or seeds and can also search for food items walking in shallow water. They may catch insects on the wing or pick them up while flying over vegetation. Western yellow wagtails frequently wag their tail while foraging. The common call of these birds is a high-pitched 'jeet'. When flying they often produce loud 'pseet' or long 'swee-eep'.

Saturday 21 September 2024

21-9-2024 MONTE CORONA, VALENCIA - ASIAN TIGER MOSQUITO

Aedes albopictus (synonym Stegomyia albopicta), from the mosquito (Culicidae) family, also known as the (Asian) tiger mosquito or forest mosquito, is a mosquito native to the tropical and subtropical areas of Southeast Asia. In the past few centuries, however, this species has spread to many countries through the transport of goods and international travel. It is characterized by the white bands on its legs and body.

This mosquito has become a significant pest in many communities because it closely associates with humans (rather than living in wetlands), and typically flies and feeds in the daytime in addition to at dusk and dawn. The insect is called a tiger mosquito for its striped appearance, which resembles that of the tiger. Ae. albopictus is an epidemiologically important vector for the transmission of many viral pathogens, including the yellow fever virus, dengue fever, and Chikungunya fever, as well as several filarial nematodes such as Dirofilaria immitis. Aedes albopictus is capable of hosting the Zika virus and is considered a potential vector for Zika transmission among humans.

Friday 20 September 2024

20-9-2024 MONTE CORONA, VALENCIA - LEAFHOPPER ASSASSIN BUG (Zelus renardii)

Zelus renardii, commonly known as the leaf hopper assassin bug, is a predacious insect contained within tribe Harpactorini.[3] Diurnal and found on both wild and crop plants, Z. renardii has spread from its native habitats in western North and Central America into three other biogeographic regions across the globe.

Zelus renardii is considered a sister species to Z. cervicalis, as they share two unique characters: the lateral margins of dorsal phallothecal sclerite are recurved, and the medial process is strongly hooked apically.

The native range of Z. renardii extends over various climatic zones throughout mainland North and Central America at altitudes between 8m to 2000m above sea level. Native ranges include tropical, dry, semi-arid, arid, and Mediterranean climates. Additionally, Z. renardii also appears well suited to urban and disturbed areas, as it has been observed in suburban areas on both native and non-native herbaceous and woody plants, as well as common garden plants. Egg masses can frequently be found on vegetable plants. Z. renardii is also sympatric with Z. tetracantus over a large part of its range in western USA, Mexico, Guatemala, Jamaica, and other parts of Central America.

The adaptability to multiple habitat conditions may have facilitated its spread in non-native regions as they have preadaptations to diverse climatic condition. To date, Z. renardii has expanded to Hawaii, where they preyed mainly on invasive sugarcane leafhopper (Perkinsiella saccharicida) and other tropical areas within the Pacific, such as Johnston Atoll, Samoa, and the Philippines. Z. renardii has also been reported in Mediterranean-type environments within Chile and Argentina.

Expansion of Z. renardii throughout Europe began in Mediterranean regions, namely Greece and Spain. However, expansion has continued and Z. renardii is now known in multiple countries in the Mediterranean basin, such as France, Italy, Turkey and Albania. The majority of these observations have been from urban areas. Eight years post-introduction in Spain, Z. renardii had a limited expansion in Mediterranean-type habitats, and was mainly limited to coastal regions of the Iberian east and south from the city of Valencia to Malaga. Additionally, Z. renardii has been observed as far southeast as the Kfar Masaryk region of northern Israel.

Given the abundance of Z. renardii in anthropogenic environments, humans are likely the main vectors of transport into non-native habitats. Since eggs, which are typically glued to plants, take 8–12 days to hatch and both the 1st and 2nd instars typically remain in the areas around their hatching site, shipping of nursery plants or plant products is thought to be a major avenue of distribution into non-native locations. Disturbed and agricultural areas are suitable for Z. renardii and may also contribute to its spread throughout native and non-native regions once established.

There appears to be no pattern of host-plant preference in Z. renardii, as it can be caught while beating and sweeping both flowering and non-flowering vegetation. Z. renardii is also common in agricultural and even urban and suburban environments.

Zelus renardii also exhibits different vertical distributions depending on age. Nymphs occupied and foraged on lower parts of plants, whereas adults spent most of their time in the upper parts of plants, which may be a mechanism to avoid either competition between individuals or cannibalism. These differences in microhabitats may affect prey encounter rates.

Zelus renardii is a medium to large hemipteran with an average total length between 10.57 and 14.25 mm. It is generally greenish-yellow ventrally and yellow-brown dorsally, with the corium distinctly reddish with paler venation. It also has a long, robust body with a cylindrical head, small reddish eyes, and a thick curved rostrum. The front tibia are covered posteriorly by glandular setae which secrete a sticky substance. Distinguishing it from other Zelus species, the scutellum is long and bears no projections and the last ventral abdominal segment is slender with a hooked median process apically.

Females are similar to male except larger in total length 12.14-14.25 mm (versus 10.57 – 12.98 mm in males), and the hemelytron extend slightly beyond the tip of the abdomen.

Zelus renardii eggs are small, kidney-shaped, and light brown in colour. They are generally laid in masses and glued to the surfaces of vegetation.

During mating, pairs of Z. renardii can copulate between 1 and 3 times per day. The female may exhibit defensive behaviour at any stage, resulting in failure of the males mating attempt. Precopulatory behaviour begins with antennal movement by both sexes. When the male is ready to mate, he approaches the female from either the front or the back; likelihood of rejection depends on the approach and mounting position. If the male approaches and tries to mount from the front, the female is more likely to exhibit defensive behaviour like foreleg raising or striking. But if the male approaches from the front and female is receptive, there is a short precopulatory period where both sexes stridulate by rubbing their rostra against prosternal grooves. Alternatively, females are less likely to exhibit defensive behaviour when the male approaches from behind; and, if the female is receptive, only the female exhibits rostral stridulation.

Thursday 19 September 2024

19-9-2024 MONTE CORONA, VALENCIA - WAVE MOTH (idaea cervantaria)


Idaea cervantaria is a species of insects with 1239 observations

Wingspan 1.4 to 2.2 cm. Straw-like in appearance, with yellowish wings with scattered dark, brown or grayish scales. On each wing it has a wavy line with small pointed dots, pointing backwards. Sometimes these details are not noticeable. Between these lines and the rear edge, it has dark spots that may have a  light wavy stripe. It has a point on each wing but the ones on the front can go unnoticed.

There are other similar species that are impossible to distinguish externally, so for correct and secure identification it is necessary to resort to genital analysis. Several of them have been found in the province of Malaga, although I. cervantaria is currently the most common and the only one that has been observed in urban environments.

In the province of Malaga, individuals determined by genital analysis were found in January, February and May, while those suspected of being so can be found in all months of the year.

19-9-2024 MONTE CORONA, VALENCIA - SARDINIAN WARBLER (MALE) (Sylvia melanocephala)


The adult female in breeding plumage is duller than male with dull grey head, brownish upperparts and cream-buff underparts with brownish-olive body sides. Bare parts are often paler than in male. In non-breeding plumage, she has tinged brownish head and duller contrasts.

The Sardinian Warbler feeds primarily on arthropods, but it also consumes a large amount of fruit and berries in autumn and winter, and nectar too. Invertebrates include insects and larvae of numerous species, spiders and small snails.

Common in many typical Mediterranean habitats including tall bushes, open woodlands, gardens, coastal scrub, and plantations; also in oases, acacia woodlands, and scrubby desert in non-breeding range.

19-9-2024 PILES PLAYA, VALENCIA - MALLARD (FEMALE) (Anas platyrhynchos)

The female is only brown and white. She is smaller than the male and has straight tail feathers. Body Length: 20-28 inches. Wing tip to wing tip: 30-40 inches.

Females and juveniles are mottled brown with orange-and-brown bills. Both sexes have a white-bordered, blue “speculum” patch in the wing. Mallards are “dabbling ducks”—they feed in the water by tipping forward and grazing on underwater plants. They almost never dive.

Unlike some waterfowl, like Mute Swans, which stay together year in and year out, Mallards only hook up for a single season. For them it’s one and done. Each fall Mallards get together in large flocks and begin the process of selecting a new mate for the following spring. They perform an assortment of wild courtship displays until pairs are formed. Once paired off the new couple has their own mating rituals, and one of these is called the “inciting” display. Here the female follows the male around, no matter where he goes. It sometimes looks as if he’s trying to get away from her and I understand why because she is yapping in his ear the entire time. This is unique because most other females save their nagging until after the wedding. And no bird can nag better than Mrs. Mallard. Her voice is the quintessential duck call. Any TV show, kid’s toy or cartoon that needs a duck call uses the voice of a female Mallard. The classic, loud “quack, quack, quack” is exclusively hers. The male’s voice, conversely, is softer and less harsh. His quiet quack has an up-note at the end, almost like he’s asking a question (probably, “Is she ever going to shut up?”).


When spring arrives it’s the female’s job to look for a place to build a nest, and now it becomes the male’s turn to follow her around. Like most ducks, Mallards need to be close to water, but not all couples can afford waterfront property. So the female will pick a spot as close as she can get, which may be in a brushy or wooded area a few hundred yards away from water. Here’s where things get interesting. After being together for most of the winter, the Mallard couple separates. While she alone builds the nest and lays the eggs, the old man stakes out a territory in a nearby pond or woodland pool. His job is to defend this feeding area so the female will have a place to rest and eat in between her nesting chores. When she needs a break from her motherly duties, she’ll fly to his territory and the two will have lunch together, much like any married couple. However, all this marital bliss ends the moment all her eggs are laid. Now she has no time for the male and will drive him away from the very pond he has been protecting for her. After fighting with her for a bit the male decides he doesn’t need the hassle and moves on. Where does he go? He usually spends the rest of the season at the local pub trying to figure out what went wrong.

19-9-2024 PILES PLAYA, VALENCIA - MALLARD (MALE) (Anas platyrhynchos)


Male Mallards have a dark, iridescent-green head and bright yellow bill. The gray body is sandwiched between a brown breast and black rear. Females and juveniles are mottled brown with orange-and-brown bills. Both sexes have a white-bordered, blue “speculum” patch in the wing.

Unlike larger waterfowl such as the Tundra Swan, which mate for life, Mallard pairs only stay together for a season. Courtship and pair formation begin each fall and winter. Groups of males display for a hen with a variety of behaviors, including head and tail shaking, head-bobbing, dipping, and whistling.

The female Mallard has between five and 14 light green eggs that she incubates for 30 days.

The ducklings are lead to water as soon as their soft, downy feathers are dry. ...

Most Mallard ducks live for one or two years, but some can live as long as 16 years!

Mallards swim with their tail held above the water.