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Marrazkia: Brown tree snake
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Brown tree snake

Boiga irregularis
Izenari buruz: Its genus, Boiga, is a group of about twenty-five snakes called 'cat-eyed' snakes because they have vertical pupils.1
Min ematen du, besterik ezMin ematen du, baina ez dizu kalte larririk egingo.
Atzeko letagineko sugeak KoskaJaten du: Haragia
Arriskua pertsonentzat: MingarriaBenetan min handia eman dezake, baina ia inoiz ez da larria.

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

Non bizi den
Coastal eastern and northern Australia, eastern Indonesia, Papua New Guinea and islands of northwestern Melanesia. Introduced to Guam.1
Asia, Australia eta Ozeania
Hasiera
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
Luzera
1 m eta 2 m artean (3,3 ft eta 6,6 ft artean)1
Abiadura handiena
6 km/h inguru (3,7 mph)
Lehorrean, kalkulu gutxi gorabeherakoa
Zer jaten du?
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
Benetan!Argazkia: Brown tree snake
Brown tree snake. Argazkia: Pavel Kirillov from St.Petersburg, Russia. CC BY-SA 2.0, Wikimedia Commons.

Nola ezagutu

  • 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

Pozoi-ahalmena

Koska

Pozoia letaginetatik edo hortzetatik ateratzen da kosk egiten duenean.

Zer egiten du bere pozoiak?

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

Zein arriskutsua da pertsonentzat?

Arriskua pertsonentzat: MingarriaBenetan min handia eman dezake, baina ia inoiz ez da larria.

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

Zer egiten du beldurtzen denean?

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

Kosk egiten badu

  • Garbitu koska, eutsi pertsona lasai eta lortu mediku-laguntza. Espezie batzuk (boomslang-a, adibidez) hilgarriak izan daitezke ordu batzuk geroago.

Deitu beti lehenik zure larrialdi-zenbakira (112, 000, 911). Lehen sorospenei buruzko orientabide orokorra da hau, ez mediku-aholkua. Lehen sorospenen oinarriak

Egon seguru

  • Ez ukitu, ez harrapatu eta ez zirikatu inoiz animalia basati bat, txikia izan arren, eta lo edo hilda dagoela badirudi ere.
  • Utzi tartea. Bat aurkitzen baduzu, egon lasai, egin atzera poliki eta utzi bere bidetik joaten.
  • Batek kosk egiten badizu: egon lasai, egon geldi, deitu zure larrialdi-zenbakira (112, 000, 911) edo joan ospitalera azkar. Gogoratu nolakoa zen, argazki batek laguntzen du.

Ez dabil zure atzetik. Pozoia janaria harrapatzeko edo bere burua babesteko erabiltzen du, eta askoz nahiago du ezkutatu. Seguru egoteari buruz gehiago

Munduko zein tokitan?

AfrikaAsiaEuropaIpar AmerikaHego AmerikaAustralia eta Ozeania

Zein handia da?

Zein luzea da?

Brown tree snake 2 m inguru luze (6,6 ft)Heldu baten bizikleta 1,8 m inguru (5,9 ft)Auto bat 4,5 m inguru (15 ft)
4 etxeko katu muturretik buztanera jarrita bezain luzea11 banana bata bestearen atzetik jarrita bezain luzea100 metro 60 segundotan egin litzake (gizakirik azkarrenak 9,6 behar ditu)

Zein handia da Brown tree snake ZUREKIN alderatuta?

Matematika hutsa zure nabigatzailean. Ez da ezer gordetzen, ezta inora bidaltzen ere.

Zein azkarra da?

jakin beharrekoa

Datuak

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

Mito-hauslea

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

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

Pozoi-adituentzat

Izen zientifikoa
Boiga irregularis
Taldea
Atzeko letagineko sugeak
Familia
Colubridae2
Ordena
Squamata
Kontinenteak
Asia, Australia eta Ozeania
Kumeak
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
Arriskua pertsonentzat
2 / 5: Mingarria3

Datuak nondik datozen

  1. Brown tree snake (Wikipedia (CC BY-SA 4.0))
  2. Boiga irregularis (iNaturalist): izenak eta sailkapena.
  3. Venom Wiki: arrisku-maila, ohiko tamaina eta abiadura-kalkulua geureak dira. Ikusi nola kalkulatzen ditugun: Nola baloratzen dugun arriskua.

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