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Brown tree snake

Boiga irregularis
Sobre el nom: Its genus, Boiga, is a group of about twenty-five snakes called 'cat-eyed' snakes because they have vertical pupils.1
Només fa malFa mal, però no et farà cap mal greu.
Serps amb ullals al darrere MossegadesMenja: Carn
Perill per a les persones: DolorósPot fer molt de mal, però gairebé mai no és greu.

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

Viu a
Coastal eastern and northern Australia, eastern Indonesia, Papua New Guinea and islands of northwestern Melanesia. Introduced to Guam.1
Àsia, Austràlia i Oceania
Inici
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
Llargada
de 1 m a 2 m (de 3,3 ft a 6,6 ft)1
Velocitat màxima
uns 6 km/h (3,7 mph)
A terra, estimació aproximada
Què menja?
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
De debò!Foto de Brown tree snake
Brown tree snake. Foto: Pavel Kirillov from St.Petersburg, Russia. CC BY-SA 2.0, Wikimedia Commons.

Com reconèixer-lo

  • 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

Poder del verí

Mossegades

El verí surt pels ullals o les dents quan mossega.

Què fa el seu verí?

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

Com de perillós és per a les persones?

Perill per a les persones: DolorósPot fer molt de mal, però gairebé mai no és greu.

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

Què fa quan té por?

When threatened it is highly aggressive, lunging and striking at the attacker repeatedly.1

Si mossega

  • Renta la mossegada, mantén la persona tranquil·la i busca ajuda mèdica. Algunes espècies (com la boomslang) poden ser mortals hores després.

Truca sempre primer al número d'emergències (112, 000, 911). Això són pautes generals de primers auxilis, no consells mèdics. Primers auxilis bàsics

Estigues segur

  • No toquis, atrapis ni molestis mai un animal salvatge, encara que sigui petit i encara que sembli adormit o mort.
  • Deixa-li espai. Si en trobes un, mantén la calma, recula a poc a poc i deixa que segueixi el seu camí.
  • Si te'n mossega un: mantén la calma, no et moguis, truca al número d'emergències (112, 000, 911) o ves de pressa a un hospital. Recorda com era, una foto ajuda.

No va a per tu. Fa servir el verí per caçar o per defensar-se, i prefereix mil vegades amagar-se. Més sobre com estar segur

Que gran és?

Quant fa de llarg?

Brown tree snake uns 2 m de llarg (6,6 ft)La bici d'un adult uns 1,8 m (5,9 ft)Un cotxe uns 4,5 m (15 ft)
fa de llarg com 4 gats de casa del nas a la cuafa de llarg com 11 plàtans en filapodria recórrer 100 metres en 60 segons (l'humà més ràpid necessita 9,6)

Que gran és Brown tree snake comparat amb TU?

Només càlculs al teu navegador. No es desa ni s'envia res enlloc.

Com de ràpid va?

val la pena saber-ho

Dades

1

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

2

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

3

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

4

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

5

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

6

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

Desmuntamites

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

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

Per a experts en verins

Nom científic
Boiga irregularis
Grup
Serps amb ullals al darrere
Família
Colubridae2
Ordre
Squamata
Continents
Àsia, Austràlia i Oceania
Cries
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
Perill per a les persones
2 / 5: Dolorós3

D'on surten les dades

  1. Brown tree snake (Wikipedia (CC BY-SA 4.0))
  2. Boiga irregularis (iNaturalist): noms i classificació.
  3. Venom Wiki: el nivell de perill, la mida típica i la velocitat estimada són nostres. Mira com els calculem: Com valorem el perill.

Cada dada d'aquesta pàgina té un número que porta a la seva font. Si ens hem equivocat en alguna cosa, perdona, som fans dels animals, no una revista científica. Escriu-nos a [email protected] i ho arreglarem.

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