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Common backswimmer

Notonecta glauca

Davart il num: Its common names come from the way it swims on its back, using its hind legs like oars in a boat.1

NunprivlusNunprivlus per umans. Nagut da far quitads.

Rujas ed insects

MorsasMangia: Charn

Privel per umans: LevSco ina piztgada d'avieul u main. Practicamain nunprivlus per umans.

The common backswimmer is a small water insect that swims upside down, under the surface of ponds. It hunts other small water creatures and can fly between ponds when the weather is warm. It is the most common backswimmer in much of its range.1

Viva en

Large parts of Europe, North Africa, and east through Asia to Siberia and China1

Europa

Pagina iniziala

It lives under the water surface in ponds, and it is also the most widespread of the four British water-boatmen. In warm late summer and autumn it flies between ponds.1

Lunghezza

1,3 cm fin 1,6 cm (0,5 in fin 0,6 in)1

Sveltezza maximala

circa 0,45 km/h (0,28 mph)

Nudar, stima approximativa

Tge mangia el?

It is a predator. It either waits for prey to pass by or swims and actively hunts it. It often feeds on mosquito (Culex) larvae at the surface, and mature females also dive to the bottom of shallow ponds to catch isopods (Asellus).1

Foto da Common backswimmer — Common backswimmer. Foto: ingridaltmann. CC BY 4.0, iNaturalist.

Co renconuscher el

Swims and rests on its back1
Body length is about 13 to 16 mm1
Females are larger than males1
Hind legs are fringed with hair and held out to the sides like oars when resting1
Body is covered in hairs, except on the head and legs1

Forza dal tissi

Morsas

Il tissi vegn or tras ses dents da tissi u ses dents, cura ch'el morda.

Quant privlus è el per umans?

Privel per umans: LevSco ina piztgada d'avieul u main. Practicamain nunprivlus per umans.

Sch'el morda

Tar pails da rujas che piztgan: auza els davent cun in bindel adesiv, lava lura la pel. Na sfruscha betg.
Tar morsas: lava e sfradenta. Tschertga agid medicinal, sche la persuna na sa senta betg bain u sanguinescha facilmain.

Clama adina l'emprim tes numer d'urgenza (112, 000, 911). Quai è in cussegl general d'emprim agid, betg in cussegl medicinal. Basa da l'emprim agid

Resta en segirezza

Na tutga, na piglia e na tizza mai in animal selvadi, gnanc in pitschen, ed era sch'el para da durmir u d'esser mort.
Dà spazi a l'animal. Sche ti scuntras in, resta calm, va plaun enavos e lascha ir el per sia via.
Sch'in tal animal ta morda: resta calm, na ta mova betg, clama tes numer d'urgenza (112, 000, 911) u va spert en in ospital. Ta regorda co ch'el veseva or, ina foto gida.

El n'ha betg quai sin tai. El dovra ses tissi per pigliar nutriment u per sa defender, e sa zuppa bler pli gugent. Dapli davart la segirezza

Nua sin il mund?

Africa Asia Europa America dal Nord America dal Sid Australia ed Oceania

Quant grond è el?

Quant lung è el?

pli curt che tes det pitschen

Quant grond è Common backswimmer cumpareglià cun TAI?

Mo matematica en tes navigatur. Nagut na vegn memorisà u tramess.

Quant svelt è el?

Ina lindorna da curtin circa 0,05 km/h (0,03 mph)

Common backswimmer circa 0,45 km/h (0,28 mph)

Ina persuna che nuda circa 3 km/h (1,9 mph)

bun da savair

Fatgs

It breathes air but has no gills. It keeps a thin film of air around its body, which can last up to 120 days.1

It can tell prey from other backswimmers by the surface waves they make. Prey waves are between 70 and 140 Hz, while other backswimmers make waves below 40 Hz.1

Its air film reduces drag when it dives. Scientists use it as a model for reducing drag, with possible uses such as on ships.1

It can see in both day and night. Its pupil takes about 40 minutes to adjust to daylight and about 50 minutes to adjust to night light.1

Per experts da tissi

Num scientific: Notonecta glauca
Gruppa: Rujas ed insects
Famiglia: Notonectidae2
Urden: Hemiptera
Continents: Europa
Poppins: It reproduces in the spring, and young backswimmers, called larvae, live in the water.1
Privel per umans: 1 / 5: Lev3

Da nua che vegnan ils fatgs

Notonecta glauca (Wikipedia (CC BY-SA 4.0))
Notonecta glauca (iNaturalist): nums e classificaziun.
Venom Wiki: il stgalim da privel, la grondezza tipica e la stima da la sveltezza èn noss agens. Guarda co che nus als calculain: Co che nus valitain il privel.

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