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(Note - timeframes can vary
by individual, geographic region, sub-specie,
litter size and other variables)
- Birth - hairless (short whiskers present),
eyelids sealed, ear canals
sealed, ear flap folded over itself; internal organs visible through
skin; claws present, toes fused; sex readily distinguishable; weight 4
- 6 g (0.13 - 0.2 oz); length - 70 mm (2 3/4 in)
- Day 1 - attempts to squirm forward on belly while moving limbs in
uncontrolled fashion
- Day 4 - animal can turn over to side when
placed on back; can turn in
circles about the pelvis using front limbs for propulsion
- Day 6 - can cling to finger when handled; can
support head in upright
position
- Day 7 - skin darkens on head and back, belly
remains pink; short hairs
appear on head, chest, shoulders and midline of back
- Day 8 - ears erect, canals remain closed
- Day 12 - can locomote backwards by pushing with
fore limbs; exhibits
“spread reflex” when suspended by tail
- Day 14 - face and back fur turning brown, chin
and chest develop white
fur; all toes separated, ear canals begin to open
- Day 18 to 22 - lower incisors erupt
- Day 20 - animal almost fully furred (partially
furred belly (pink skin
still visible), lateral hairs begin to develop on tail)
- Day 21 - responds to loud noises
- Day 28 - animal now fully furred, longer and
softer than southern
counterpart
- Day 28 to 32 - eyes open
- Day 30 to 33 - upper incisors erupt
- Day 35 - weighs about 30 g (1 oz); length
approximately 18 cm (7 in)
- Day 38 - attempts made at washing with
forepaws; scratch head with hind
foot; nesting material feebly pulled and rearranged; takes interest in
solid food
- Day 40 - first excursion outside nest (usually
a few seconds); can
ascend tree trunks slowly; unable to descend
- Day 49 - can prop themselves on haunches
- Day 58 - horizontal jumps of 15.2 - 20.3 cm (6
- 8 in) after much
head-bobbing; able to descend tree trunks
- Day 60 - weaning begins - can take several weeks
- Day 66 - leaps of .6 to .9 m (2 - 3 ft)
- Day 70 - glides up to 1.8 m (6 ft)
- Day 75 - much longer glides practiced
- Day 88 - capable of independent survival
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