Milkweed Assassin Bug

The milkweed assassin bug (Zelus longipes) is a predatory true bug of gardens, fields and scrub from the southern United States through Central America and the Caribbean to South America. It is about 1.5 cm long. It ambushes other insects on plants and stabs them with a curved, piercing beak.

• Active by day, waiting motionless on flowers, stems and leaves for prey.
• Catches flies, caterpillars, beetles, bees and other soft-bodied insects.
• Injects saliva that paralyzes the prey and liquefies its tissues, then sucks out the contents.
• Females lay clusters of eggs glued upright on leaves; nymphs are also predators.

Habitat: garden, field edge, and shrubby habitat

Native range: The Americas

Milkweed Assassin Bug eats the foods its body design and habitat make easiest to access. Diet can shift across seasons, life stages, and local competition.

• The most accessible prey or plant foods in its habitat
• Energy-rich foods that match its size and behavior
• Seasonal resources available in the local environment

A practical answer for Milkweed Assassin Bug always depends on what food is actually available in garden, field edge, and shrubby habitat.

Rarity: Relatively common · 41/100. Milkweed Assassin Bug remains fairly widespread where garden, field edge, and shrubby habitat is still available.

• Keep distance and let the animal choose the space.
• Avoid blocking movement routes, nesting areas, or feeding behavior.
• Use optics, patience, and quiet observation instead of crowding for a closer view.