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Setshwantsho sa khathune sa Common backswimmer
No. 1069 ho 1 402

Common backswimmer

Notonecta glauca
Ka lebitso: Its common names come from the way it swims on its back, using its hind legs like oars in a boat.1
Ha e na kotsiHa e na kotsi ho batho. Ha ho letho la ho tshwenyeha.
Diboko le dikokoanyana Ho lomaE ja: Nama
Kotsi ho batho: E bobebeJwaloka ho hlajwa ke notshi kapa ho fetang moo. Ha e na kotsi ho batho.

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

E phela
Large parts of Europe, North Africa, and east through Asia to Siberia and China1
Yuropa
Lapeng
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
Bolelele
1,3 cm ho isa ho 1,6 cm (0,5 in ho isa ho 0,6 in)1
Lebelo le phahameng
e ka bang 0,45 km/h (0,28 mph)
Ho sesa, kakanyo feela
E ja eng?
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
Ka nnete!Foto ya Common backswimmer
Common backswimmer. Foto: ingridaltmann. CC BY 4.0, iNaturalist.

Ho e tseba jwang

  • 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

Matla a chefo

Ho loma

Chefo e tswa ka meno a yona a chefo (fangs) kapa ka meno a mang ha e loma.

E kotsi hakae ho batho?

Kotsi ho batho: E bobebeJwaloka ho hlajwa ke notshi kapa ho fetang moo. Ha e na kotsi ho batho.

Haeba e loma

  • Bakeng sa boya bo hlabang ba diboko: bo tlose ka theipi e kgomarelang, ebe o hlatswa letlalo. O se ke wa hohla.
  • Bakeng sa ho longwa: hlatswa mme o pholise. Fumana thuso ya bongaka haeba motho a ikutlwa a kula kapa a tswa madi habonolo.

Kamehla letsetsa nomoro ya tshohanyetso pele (112, 000, 911). Ena ke tataiso e akaretsang ya thuso ya pele, hase keletso ya bongaka. Metheo ya thuso ya pele

Dula o bolokehile

  • O se ke wa ama, wa tshwara kapa wa tena phoofolo ya naheng, leha e le e nyenyane, le leha e shebahala e robetse kapa e shwele.
  • E fe sebaka. Ha o kopana le yona, dula o kgutsitse, kgutlela morao butle mme o e tlohele e tsamaye ka tsela ya yona.
  • Haeba e nngwe e o loma: dula o kgutsitse, o se ke wa sisinyeha, letsetsa nomoro ya tshohanyetso (112, 000, 911) kapa o ye sepetlele kapele. Hopola hore e ne e shebahala jwang, foto e a thusa.

Ha e o batle. E sebedisa chefo ya yona ho tshwara dijo kapa ho itshireletsa, mme e kgetha ho ipata. Ho eketsehileng ka ho dula o bolokehile

Hokae lefatsheng?

AfrikaAsiaYuropaAmerika LeboyaAmerika BorwaAustralia le Oceania

E kgolo hakae?

E telele hakae?

Common backswimmer bolelele ba e ka bang 1,6 cm (0,6 in)Thollo ya raese e ka bang 7 mm (0,3 in)Tjhelete ya tshepe ya euro e le nngwe e ka bang 2,3 cm (0,9 in)
e kgutshwane ho feta monwana wa hao o monyenyane

Common backswimmer e kgolo hakae ha e bapiswa le WENA?

Ke dipalo feela ka hara sebatli sa hao. Ha ho letho le bolokwang kapa le romelwang kae kapa kae.

E potlaka hakae?

ho molemo ho tseba

Dintlha

1

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

2

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

3

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

4

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

Bakeng sa ditsebi tsa chefo

Lebitso la saense
Notonecta glauca
Sehlopha
Diboko le dikokoanyana
Lelapa
Notonectidae2
Tatelano
Hemiptera
Dikontinente
Yuropa
Masea
It reproduces in the spring, and young backswimmers, called larvae, live in the water.1
Kotsi ho batho
1 / 5: E bobebe3

Moo dintlha di tswang teng

  1. Notonecta glauca (Wikipedia (CC BY-SA 4.0))
  2. Notonecta glauca (iNaturalist): mabitso le tlhophiso.
  3. Venom Wiki: boemo ba kotsi, boholo bo tlwaelehileng le kakanyo ya lebelo ke tsa rona. Bona kamoo re di balang ka teng: Kamoo re lekanyang kotsi ka teng.

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Tse ding tsa sehlopha se le seng: Diboko le dikokoanyana

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E boetse e phela: Yuropa

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Fepa phephengnkgo ya ditjhelete tsa teboho, e e boloka e le mahala