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Western hognose snake

Heterodon nasicus

Om navnet: "Hognose" comes from its upturned nose, which looks hog-like. The scientific name nasicus comes from the Latin nasus, meaning "nose".1

HarmløsHarmløs for mennesker. Intet at bekymre sig om.

Bagtandede slanger

BidSpiser: Kød

Fare for mennesker: MildSom et bistik eller mindre. Stort set harmløst for mennesker.

The western hognose snake is a small, stout-bodied snake with an upturned nose that looks a bit like a pig's snout. It lives across much of North America, from southern Canada to northern Mexico, in sandy and gravelly places such as prairies and grasslands. It is often mistaken for a rattlesnake, but its bite is not regarded as dangerous to people.1

Lever i

Southern Canada, through the United States, to northern Mexico. Endemic to North America.1

Nordamerika

Forside

It favours areas with sandy or gravelly soils, including prairies, river floodplains, scrub, grasslands, semi-deserts and some semi-agricultural land. It has been found at elevations of up to 2,500 m (8,200 feet).1

Længde

13 cm til 50 cm (5,1 in til 1,6 ft)1

Tophastighed

cirka 4,7 km/t (2,9 mph)

På land, groft gæt

Hvad spiser det?

It mainly eats amphibians, such as large and medium tree frogs, small or medium toads and small lizards, and occasionally a rodent. It is not a true constrictor, so it bites and chews, driving its rear fangs into prey.1

Foto af Western hognose snake — Western hognose snake. Foto: Peter Paplanus. CC BY 4.0, iNaturalist.

Sådan genkender du det

Relatively small and stout-bodied, with adults rarely exceeding 40–50 cm in total length, tail included.1
A modified, upturned nose scale gives it a distinctive hog-like snout.1
Colour and pattern vary a great deal between subspecies and individuals.1
When threatened, it flattens its neck, hisses and may puff up its throat with air.1

Forveksles ofte med: To an untrained eye, most individuals look much like rattlesnakes, which is thought to be a form of mimicry that makes predators wary. Its upturned snout and small, stout body are features to note.1

Giftkraft

Bid

Giften kommer ud gennem gifttænderne eller tænderne, når det bider.

Hvad gør dets gift, når det bider eller stikker?

The snake releases modified saliva from its Duvernoy's glands, which runs down a groove in its rear fang and helps break down the toxins of toads it eats. No deaths or whole-body (systemic) effects in people have been recorded from its bite. Bites may occasionally be medically significant.1

Hvor farligt er det for mennesker?

Fare for mennesker: MildSom et bistik eller mindre. Stort set harmløst for mennesker.

The species is not dangerous to people and is not regarded as venomous. Its bites are extremely rare, and no deaths or systemic effects have been recorded. Bites may uncommonly be medically significant.1

Hvad gør det, når det er bange?

It flattens its neck, hisses and may make mock strikes with its mouth closed. If harassed further, it usually plays dead rather than biting.1

Hvis det bider

Vask biddet, hold personen rolig, og få lægehjælp. Nogle arter (som boomslangen) kan være dødelige flere timer senere.

Ring altid først til dit alarmnummer (112, 000, 911). Dette er generel førstehjælpsvejledning, ikke lægelig rådgivning. Grundlæggende førstehjælp

Pas på dig selv

Rør aldrig ved, fang eller dril et vildt dyr, heller ikke et lille et, og heller ikke hvis det ser ud til at sove eller være dødt.
Giv det plads. Hvis du møder et, så bliv rolig, træd langsomt tilbage, og lad det gå sin egen vej.
Hvis et bider dig: Bevar roen, hold dig i ro, ring til dit alarmnummer (112, 000, 911), eller kom hurtigt på hospitalet. Husk, hvordan det så ud, et billede hjælper.

Det er ikke ude efter dig. Det bruger sin gift til at fange føde eller beskytte sig selv, og det gemmer sig meget hellere. Mere om sikkerhed

Hvor i verden?

Afrika Asien Europa Nordamerika Sydamerika Australien & Oceanien

Hvor stort er det?

Hvor langt er det?

lige så lang som 3 bananer på rækkelige så lang som 16 byggeklodser på rækkekunne løbe 100 meter på 77 sekunder (det hurtigste menneske skal bruge 9,6)

Hvor stor er Western hognose snake i forhold til DIG?

Bare matematik i din browser. Intet bliver gemt eller sendt nogen steder hen.

Hvor hurtigt er det?

En skildpadde cirka 0,3 km/t (0,19 mph)

Western hognose snake cirka 4,7 km/t (2,9 mph)

Et menneske, der går cirka 5 km/t (3,1 mph)

værd at vide

Fakta

Captive breeders have produced more than 50 'designer' colour morphs of this snake.1

In captivity, many hognose snakes refuse food for about two to three and a half months, from January to mid March, because they instinctively brumate, or sleep, underground in winter.1

Males are considerably smaller than females.1

Hatchlings reach sexual maturity after about two years, based mostly on size rather than age.1

Myteknuser

Myte: Because it looks like a rattlesnake, it must be dangerous or deadly.

Sandhed: The western hognose snake is not dangerous to people. Its rare bites have not caused recorded deaths or whole-body effects, and it usually plays dead instead of biting.1

For gifteksperter

Videnskabeligt navn: Heterodon nasicus
Gruppe: Bagtandede slanger
Familie: Colubridae2
Orden: Squamata
Kontinenter: Nordamerika
Unger: It lays eggs. Females lay 4–23 elongate, thin-shelled eggs between June and August, which hatch after about 60 days.1
Hvordan det klarer sig i naturen: Least Concern (IUCN)1
Fare for mennesker: 1 / 5: Mild3

Hvor fakta kommer fra

Western hognose snake (Wikipedia (CC BY-SA 4.0))
Heterodon nasicus (iNaturalist): navne og klassifikation.
Venom Wiki: fareniveauet, den typiske størrelse og hastighedsgættet er vores egne. Se, hvordan vi regner dem ud: Sådan vurderer vi faren.

Hvert faktum på denne side har et nummer, der peger på kilden. Hvis vi har taget fejl, så undskyld, vi er dyrefans, ikke et videnskabeligt tidsskrift. Skriv til os på [email protected], så retter vi det.

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