Newborn: A newborn panda cub is only one-thousandth of the weight of its mother. The average weight is only about 120 grams, the lightest is 51 grams, and the heaviest is 225 grams. 

The cub has pink skin and white hair, its eyes and ears are not fully developed, nor its immune system.

One to two weeks old: its shoulder harness, limbs and ears become darker.

One month old: the cub starts growing black and white hair, it weighs 1-2 kg, and it can’t walk yet.

Six to eight weeks old: the cub can blink and starts to grow milk teeth.

Three months old: the cub can crawl slowly.

Six months old: the cub can walk freely and starts eating bamboo.

One year old: the cub has full milk teeth by now.

One and a half to two years old: the panda leaves its mother and starts living independently.  

Sub-adult: this is the period when the panda is one year and a half, before becoming sexually mature. It’s like human beings’ teenage period.

At this stage, the food of pandas has gradually shifted from nutrient-rich milk to bamboo with high fiber and low nutrition. The panda becomes more mature physiologically and psychologically and starts breeding.

Pandas are the most active during the age of 1-3. Every day, in addition to eating, they spend most of their time playing, exploring and climbing trees. When they’re 3 to 4 years old, they start growing permanent teeth.

Adult: the panda is about 160-180 cm long and weighs about 80-150 kg.