Dolomedes

Dolomedes is a genus of large semi-aquatic spiders belonging to the family Pisauridae, commonly known as fishing spiders or raft spiders. These spiders are found worldwide in wetland habitats such as swamps, marshes, ponds, and streams.

Characteristics:

Dolomedes spiders are typically large, with some species reaching impressive sizes. They are characterized by their long legs, which allow them to easily walk on water surfaces. Their coloration varies depending on the species and habitat, often providing camouflage among vegetation and rocks. They possess excellent eyesight, crucial for hunting and navigating their aquatic environment.

Habitat and Distribution:

Dolomedes spiders are found in a wide range of freshwater habitats globally. Their distribution depends on the specific species and their tolerance to different environmental conditions. They are commonly found near still or slow-moving water, where they can hunt effectively.

Behavior and Diet:

Dolomedes spiders are ambush predators, often waiting patiently at the water's edge or on floating vegetation for prey to approach. They primarily feed on aquatic insects, small fish, tadpoles, and other invertebrates that venture near the surface of the water. They detect vibrations on the water's surface to locate prey. When hunting, they can submerge themselves briefly to capture their target. They often carry their prey back to a safe location to consume it.

Reproduction:

Female Dolomedes spiders are known for their elaborate maternal care. After mating, the female will construct a silken nursery web, typically attached to vegetation near the water. She guards the egg sac within this web until the spiderlings hatch. After hatching, the spiderlings remain in the nursery web for a period before dispersing.