Venom Wiki / Alle dyr / Bagtandede slanger

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Brown tree snake

Boiga irregularis

Om navnet: Its genus, Boiga, is a group of about twenty-five snakes called 'cat-eyed' snakes because they have vertical pupils.1

Gør bare ondtDet gør ondt, men det skader dig ikke alvorligt.

Bagtandede slanger

BidSpiser: Kød

Fare for mennesker: SmertefuldDet kan gøre rigtig ondt, men det er næsten aldrig alvorligt.

The brown tree snake is a slender, night-active snake that climbs well and hunts in trees and on the ground. It lives in coastal northern and eastern Australia, eastern Indonesia, Papua New Guinea and nearby islands. It is famous for harming wildlife on the island of Guam, where it was introduced by accident.1

Lever i

Coastal eastern and northern Australia, eastern Indonesia, Papua New Guinea and islands of northwestern Melanesia. Introduced to Guam.1

Asien, Australien & Oceanien

Forside

It lives in forests, grasslands and sparsely forested areas, and is common in places disturbed by people. It hides during the day in palm crowns, hollow logs, rock crevices, caves and the dark corners of thatched houses near the roof. In Darwin, Australia, it is most often met in suburban areas during the wet season from January to March.1

Længde

1 m til 2 m (3,3 ft til 6,6 ft)1

Tophastighed

cirka 6 km/t (3,7 mph)

På land, groft gæt

Hvad spiser det?

It eats birds, lizards, bats, mice, other small rodents and frogs, as well as many invertebrates and their eggs. It hunts using both sight and chemical cues. Often it wraps its body around its prey like a constrictor to hold it still while it eats.1

Foto af Brown tree snake — Brown tree snake. Foto: Pavel Kirillov from St.Petersburg, Russia. CC BY-SA 2.0, Wikimedia Commons.

Sådan genkender du det

Slender body, with a large head compared to its body1
Usually brown, but can be yellowish, green or beige1
Some individuals have red, saddle-shaped blotches1
Vertical pupils, like a cat's eyes1
Active at night, and usually found in trees1

Giftkraft

Bid

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

Hvad gør dets gift, når det bider eller stikker?

It has two small, grooved fangs at the back of the mouth, so venom flows into the bite slowly rather than being injected in one go. The venom is weakly neurotoxic, meaning it affects the nerves, and may also damage cells locally. Its effects are trivial for adults, and it is mainly used to subdue lizards.1

Hvor farligt er det for mennesker?

Fare for mennesker: SmertefuldDet kan gøre rigtig ondt, men det er næsten aldrig alvorligt.

The snake is considered aggressive when threatened but not dangerous to adult humans. Serious medical consequences have been limited to children, who are more affected because of their low body mass. On Guam, it has caused widespread power outages, pet losses and emotional distress to residents.1

Hvad gør det, når det er bange?

When threatened it is highly aggressive, lunging and striking at the attacker repeatedly.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 4 huskatte fra snude til halelige så lang som 11 bananer på rækkekunne løbe 100 meter på 60 sekunder (det hurtigste menneske skal bruge 9,6)

Hvor stor er Brown tree snake i forhold til DIG?

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

Hvor hurtigt er det?

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

Brown tree snake cirka 6 km/t (3,7 mph)

Et barn på cykel cirka 12 km/t (7,5 mph)

værd at vide

Fakta

Snakes on Guam have been seen moving up large smooth cylinders using a method called 'lasso locomotion', which had not been recorded in snakes before. It is tiring, so they move slowly and stop often.1

On Guam, where prey is plentiful and there are few predators, the snakes have grown to 3 m, much longer than their typical 1 to 2 m in their native range.1

Shortly after World War II, the snake reached Guam by accident, probably as a stowaway in ship cargo or in aircraft landing gear. Its numbers then grew to unprecedented levels.1

Trained dogs are used on Guam to find and remove snakes before cargo and transport vessels leave the island.1

Female brown tree snakes have been seen performing courtship behaviours normally used by males, such as tongue-flicking and head-jerking.1

Brown tree snakes can survive for long periods without food.1

Myteknuser

Myte: The brown tree snake is a deadly snake that is dangerous to adults.

Sandhed: It is not considered dangerous to adult humans. Its venom is weak and serious effects have mainly been seen in young children.1

For gifteksperter

Videnskabeligt navn: Boiga irregularis
Gruppe: Bagtandede slanger
Familie: Colubridae2
Orden: Squamata
Kontinenter: Asien, Australien & Oceanien
Unger: The female lays 4 to 12 oblong eggs with leathery shells and may lay up to two clutches a year. The eggs hatch about 90 days later.1
Fare for mennesker: 2 / 5: Smertefuld3

Hvor fakta kommer fra

Brown tree snake (Wikipedia (CC BY-SA 4.0))
Boiga irregularis (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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