Pest Information for Calabasas, San Fernando Valley

Given the hot, dry summer pattern we’re seeing this June along the Mulholland Corridor—with temperatures consistently in the 85-90°F range and no measurable rain—the two pests most active right now are **Western black widow spiders** and **western rattlesnakes**. The extreme wildfire zone conditions, combined with mandatory brush clearance, actually create ideal harborage for black widows: they thrive in the dry, sheltered spaces beneath stacked firewood, inside detached barns and equipment sheds common on estate properties, and under the eaves of secondary living quarters. Meanwhile, rattlesnakes are moving actively during the cooler morning and evening hours, seeking out the seasonal creek beds and rocky outcroppings that define this high-elevation ridge line. With large acreage, gated long driveways, and abundant wildlife corridors (mountain lions, bobcats, coyotes), these snakes often follow rodent trails right up to the foundation of custom homes built between the 1980s and 2020s. Homeowners should watch for black widow webbing in dark corners of sheds, under patio furniture, and around outdoor faucets—especially near Mulholland Highway and Old Topanga Road. For rattlesnakes, look for shed skins near rock walls, under decks, or along the edges of mandatory brush clearance zones, and listen for the distinctive buzz near seasonal creek crossings or around water features on your property. Below are the top-rated Calabasas exterminators who specialize in these specific seasonal threats.