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Common backswimmer

Notonecta glauca

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

OnskadelikOnskadelik vir mense. Niks om oor bekommerd te wees nie.

Ruspes & goggas

ByteEet: Vleis

Gevaar vir mense: LigSoos 'n bysteek of minder. Basies onskadelik vir mense.

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

Leef in

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

Europa

Tuis

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

Lengte

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

Topspoed

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

Swem, rowwe skatting

Wat eet dit?

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

Hoe om dit te herken

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

Gifkrag

Byte

Gif kom deur sy giftande of tande uit wanneer dit byt.

Hoe gevaarlik is dit vir mense?

Gevaar vir mense: LigSoos 'n bysteek of minder. Basies onskadelik vir mense.

As dit byt

Vir ruspe-brandhare: lig hulle af met kleefband en was dan die vel. Moenie vryf nie.
Vir byte: was en koel af. Kry mediese hulp as die persoon sleg voel of maklik bloei.

Bel altyd eers jou noodnommer (112, 000, 911). Dit is algemene noodhulpraad, nie mediese advies nie. Noodhulp-basiese beginsels

Bly veilig

Moet nooit aan 'n wilde dier raak, dit vang of terg nie, selfs nie 'n kleintjie nie, en selfs nie as dit lyk of dit slaap of dood is nie.
Gee dit spasie. As jy een raakloop, bly kalm, stap stadig terug en laat dit sy eie pad gaan.
As een jou byt: bly kalm, bly stil, bel jou noodnommer (112, 000, 911) of kom vinnig by 'n hospitaal uit. Onthou hoe dit gelyk het, 'n foto help.

Dit is nie uit om jou te kry nie. Dit gebruik sy gif om kos te vang of om homself te beskerm, en kruip baie eerder weg. Meer oor veilig bly

Waar in die wêreld?

Afrika Asië Europa Noord-Amerika Suid-Amerika Australië & Oseanië

Hoe groot is dit?

Hoe lank is dit?

korter as jou pinkie

Hoe groot is Common backswimmer in vergelyking met JOU?

Net wiskunde in jou blaaier. Niks word gestoor of enige plek heen gestuur nie.

Hoe vinnig is dit?

'n Tuinslak omtrent 0,05 km/h (0,03 mph)

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

'n Mens wat swem omtrent 3 km/h (1,9 mph)

die moeite werd om te weet

Feite

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

Vir gifkenners

Wetenskaplike naam: Notonecta glauca
Groep: Ruspes & goggas
Familie: Notonectidae2
Orde: Hemiptera
Kontinente: Europa
Babas: It reproduces in the spring, and young backswimmers, called larvae, live in the water.1
Gevaar vir mense: 1 / 5: Lig3

Waar die feite vandaan kom

Notonecta glauca (Wikipedia (CC BY-SA 4.0))
Notonecta glauca (iNaturalist): name en klassifikasie.
Venom Wiki: die gevaarvlak, die tipiese grootte en die spoedskatting is ons eie. Kyk hoe ons dit uitwerk: Hoe ons gevaar gradeer.

Elke feit op hierdie bladsy het 'n nommer wat na sy bron wys. As ons iets verkeerd het, jammer, ons is dierfanatici, nie 'n wetenskaplike joernaal nie. Laat weet ons by [email protected] en ons maak dit reg.

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