APPEARANCE
The sugar glider is perhaps the
most striking in appearance of all the marsupials. They are generally 11-16 in (27.5 - 40 cm) in length, with 6-8 in
(15-20 cm) of that belonging to the bushy, non-prehensile tail. Sexual
dimorphism is present in this species, with the males being larger than
the females. The males weigh approximately 115-160 g, while the
females weigh 100-135 g.
Sugar gliders have a squirrel-like
body ending in a long tail. The heady is rather short and narrow. The
legs are small and end in five-digit feet. All of the toes are clawed,
with the exception of the opposable toe on each hind foot. The hind
feet are syndactylus, with two of the toes being partially fused
together. The sugar glider uses these fused toes for grooming.
Sugar gliders are covered with
thick, soft fur. The coat is usually blue-grey in colour, but some
specimens have been known to be yellow or tan, and even albinos are
known to exist. A black stripe extends from the nose over the head and
ends midway across the back. A black ring encircles either eye and
extends back to the large, hairless ears. The last few inches of the
tail are also black. The underbelly, chest, and throat are a light
cream to white in colour. The top of the patagium is blue-grey, the
underside is generally white interspersed with dark hairs, and the edge
is a bright white.
Sugar gliders are marsupials, and
so the females do have a marsupium (pouch). The marsupium is roughly ½
in (12.5 mm) in length, and is located in the middle of her abdomen.
Sugar glider males also have a feature unique to many other marsupials –
they have a bifurcated penis. In other words, their penis has two
shafts, and acts like two separate penises.
Sugar gliders are highly vocal,
often making what is known as a "crabbing" noise, somewhat reminiscent
of an electric blender. They also bark, chirp, and chatter amongst
themselves.
Sugar gliders have many scent
glands used for marking territory. The males have three primary scent
glands: one located on the forehead, one on the chest, and one alongside
the cloaca (an opening for the urinary, gastrointestinal, and
reproductive tracts). The best way to tell a male sugar glider apart
from a female is to look at the forehead, as in males the scent gland up
there is visible as a bald spot.
Sugar gliders have an acute sense of smell and hearing. They are nocturnal, and so also have acute night vision.
Sugar gliders have a life span of 9 years in the wild, 12 in captivity.
HABITAT
Sugar gliders are found throughout
eastern and northern Australia (some have even been found in southern
Australia), as well as its nearby islands, including Tasmania and Papua
New Guinea. They can be found in all types of forests, but prefer the
open forests where there is room to glide. Sugar gliders are social
animals, nesting in family groups of up to twelve individuals. These
groups are headed by a dominant male who will do most of the territorial
marking. This territory, though small, consists of several eucalyptus
trees and is readily defended by the entire group.
Sugar gliders are nocturnal,
spending their days sleeping in a nest in a hollow portion of a tree.
At night they are highly energetic, performing amazing acts of aerial
acrobatics and gliding distances of 200 ft (66 m).
If food becomes scarce in the winter months, sugar gliders have been known to hibernate.
FOOD
Sugar gliders are omnivorous in
nature, often preying upon insects and insect larvae, as well as birds,
bird eggs, small lizards, and arachnids in the summer months, and
turning to plant products in the winter months: nectar, fruits, leaves,
sap, and pollen.
Sugar gliders are so named for a
reason – they have a sweet tooth. Their main source of sugar comes from
the eucalyptus tree; by tearing into its bark they can get at the sweet
honey-like sap.
ENEMIES
Sugar gliders are extremely common
throughout their entire range, and are considered one of the most
abundant of the Australian mammals. They have many natural introduced
predators, including kookaburras, lace monitors, owls, foxes, cats, and
dogs.
Humans are also somewhat of a
threat to sugar gliders, due to the destruction of their forest habitat.
BREEDING
Sugar gliders reach sexual maturity
at 7-10 months. The mating season usually occurs in August, but can
extend from June to November.
The dominant male is often the only male
in the social group to mate, but it is the females who decide who he
mates with. The male first approaches the female he is hoping to mate
with and rubs his forehead's scent gland on her belly. If she accepts
him, she then rubs her forehead on his belly, and they mate. The
gestation period is short, only 15-17 days.
The female births 1-3
underdeveloped young which are hairless, less than 0.5 g in weight, and
only 5 mm in length. The young make their way into their mother's
marsupium where they grasp onto one of four teats. There they remain
for 60-70 days. Ten days after they emerge, their eyes open, and after a
month they are ready to eat solid food. Although they quickly become
independent, they may remain with their mother for several years.
RELATIVES
There are thought to be seven subspecies of the sugar glider based on appearance and geographic location: P. b. longicaudatus (Queensland); P. b. ariel (Northern Territory); P. b. flavidus (southern New Guinea); P. b. tafa (Owen Stanley Range); P. b. papuanus (northern New Guinea); P. b. biacensis (Biak Island); and P. b. breviceps (from Tasmania to Tropic of Capricorn). There are several other species in this genus, including the squirrel glider.
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