Facts about Syrian Hamsters

1. 07

   Golden hamsters possess a specialized organ called Harderian glands that produce a lipid-rich secretion used for scent marking and grooming their fur.

   Syrian HamstersMay 14sharebiologyanatomybehavior
2. 06

   Nocturnal Syrian hamsters possess eyes adapted for low-light vision with a reflective layer behind the retina that amplifies available light during their active nighttime hours.

   Syrian HamstersMay 14sharebiologysensoryadaptation
3. 05

   A Syrian hamster's lifespan averages 2 to 3 years in captivity, with some individuals reaching up to 4 years under optimal care conditions.

   Syrian HamstersMay 14sharebiologylifespanmeasurement
4. 04

   Solitary by nature, Syrian hamsters become aggressive toward each other after 5 to 10 weeks of age and must be housed individually to prevent serious fighting.

   Syrian HamstersMay 14sharebehaviorbiologysocial
5. 03

   In 1971, Syrian hamsters were discovered to have a circadian rhythm of approximately 23.5 hours, making them naturally misaligned with Earth's 24-hour day cycle.

   Syrian HamstersMay 14sharebiologycircadianbehavior
6. 02

   The Syrian hamster's cheek pouches can expand to hold up to 20 percent of their body weight in food for transport back to their burrow.

   Syrian HamstersMay 14sharebiologyanatomybehavior
7. 01

   Approximately 2.5 inches long at birth, Syrian hamsters reach full adult size of 5 to 7 inches within just 3 to 4 weeks.

   Syrian HamstersMay 13sharebiologymeasurementgrowth