In a revelation that challenges our typical view of spiders, certain species demonstrate extraordinary parental care, reminiscent of mammals. Among these, the Chinese grasshopper spider, Toxeus magnus, stands out for its unique nurturing method. These spiders raise their offspring within the safety of nests, providing them with a milk-like substance significantly richer in nutrients than cow’s milk.
Building Safe Havens for Growth
Researchers have uncovered that these maternal spiders construct nests as a secure environment for their offspring’s development. Unlike the common expectation of spiders bringing prey to their young, these nests do not serve as food storage. Instead, the secret behind the growth of these spiderlings lies in the highly nutritious milk produced by the female spiders. Remarkably, this spider milk boasts a protein content four times greater than that of cow’s milk, highlighting its exceptional nutritional value.
From Licking to Sucking: The Feeding Process
The feeding process within the nest is both intricate and intimate. Initially, the mother spider secretes milk onto the nest’s surface, allowing the tiny hatchlings to lick the nutritious droplets. As the spiderlings mature, they transition to sucking the milk directly from their mother’s special glands located at the bottom of her abdomen.
The Crucial Role of Maternal Milk
Further investigation through experiments has shed light on the critical dependence of these spiderlings on their mother’s milk. The female spiders continue to feed their young this vital nourishment until they reach approximately 40 days old, nearing the cusp of adulthood. This period of maternal care within the nest’s confines ensures a high survival rate, with about three-quarters of the offspring reaching maturity.
