Northern White-lipped Python

Female adults of L. albertisii grow to an average of about 213 cm (6–7 ft) in total length (including tail). Both sexes are patternless, except for some light markings on the postoculars. The dorsum of the head is shiny black, and the upper and lower labial scales are white with black markings on the anterior edge of the scales. Body color is either brownish-violet fading to yellowish ventrally or blackish-blue fading to gray.

L. albertisii is found in most of New Guinea below 1,200 m (3,900 ft), including the islands of Salawati and Biak, Normanby, Mussau and Emirau, as well as a few islands in the Torres Strait. The type locality given is "Kapaor in Nova Guinea boreali occidentali ... et prope Andai ". The authors also stated localities for two additional specimens: "... un esemplare a Kapaor fra i Papua Onin..." and "... un secondo esemplare ad Andai presso Dorei..." (= Kapaur, Onin Peninsula and Andai, near Doreri, West Papua, Indonesia). Some doubt can be cast on its occurrence on Normanby, as McDowell (1975) had erroneously assigned Bara Bara to this island, rather than to the mainland of Papua New Guinea in Milne Bay Province as stated by Boulenger (1898) and Koopman (1982).

Although mostly terrestrial, L. albertisii can and is known to occasionally climb. White-lipped pythons are reportedly aggressive, though this is reduced in those born and raised in captivity. L. albertisii also has been observed to regularly regurgitate fur balls from its prey.