Red pandas may recognize one another based on their smell glands.
Red pandas, with the exception of mothers and their newborn pups, often prefer to live alone. Red panda females, like giant pandas, are only ovulatory for one or two days a year and can postpone the implantation of a fertilized egg for weeks. To guarantee that cubs are born when the most fragile and easily digested bamboo shoots and leaves are available, generally in late spring, red pandas' gestation cycle can be as short as 93 days or as long as 156 days. Males must try to locate a female companion during this season since they are solitary, and they start looking for a good mate in the winter and early spring.
Male pandas use the smell glands on their foot and at the base of their tails to mark their territory and attract the attention of other pandas. The glands release a white liquid that pandas find smelly but which is odorless to humans. The red panda uses the bottom of its tongue, which has a cone-like structure for collecting fluids and bringing it close to a gland within its mouth, to detect scents. It is the only carnivore with this adaptability. Personal poop mounds are their second choice, which is also a cute prank. This is one of the interesting facts about red pandas.