Orange County Faces Increased Rat Activity as Winter Approaches

As winter descends upon Orange County, residents are being warned about a significant rise in rat activity as these pests seek warmth and shelter indoors. The Orange County Mosquito and Vector Control District has emphasized the health risks associated with the infiltration of these rodents, particularly in areas where they can spread flea-borne typhus and various disease-causing filth.

Identifying the Rodents

The roof rat (Rattus rattus) has emerged as the primary concern within the county. Characterized by its slender body and a tail that exceeds the length of its body and head combined, roof rats are adept at navigating neighborhoods using the utility lines and fences. Their diet typically includes wild birdseed, pet food, and fruits from residential gardens. Residents are advised to look out for key signs of rat activity, including:

– Partially eaten fruits and broken snail shells
– Signs of gnawing on plastic, wood, or rubber
– Greasy marks left by the rats’ oily fur
– Half-inch spindle-shaped droppings near food sources or shelters

Preventive Measures for Homeowners

With rats attracted to homes where food, water, or shelter is readily available, the Control District is urging residents to take proactive steps to mitigate the risk. Effective strategies include:

• Sealing Structural Openings: Close any gaps as small as a quarter around doors, garages, and vents.
• Eliminating Food Sources: Harvest ripe fruits promptly and store pet food and birdseed in sealed metal containers. Also, secure trash cans with tightly fitted lids.
• Removing Shelter: Trim back overgrown vegetation near buildings and fences, seal outdoor storage areas, and stack firewood properly—at least 18 inches off the ground and a foot away from walls.
• Using Snap Traps: Set wooden snap traps in appropriate locations inside and outside buildings, ensuring safe disposal of any trapped rodents.

Mosquito Activity in Winter

While mosquito activity wanes in the colder months, it doesn’t cease completely, especially during rainy spells that can warm up late winter days. The Aedes mosquito, notorious for biting ankles, can lay dormant eggs for up to a year, which hatch in the presence of water.

Residents are encouraged to reduce potential mosquito breeding by taking the following precautions:

• Inspect containers for Aedes eggs and scrub interiors with hot soapy water or undiluted bleach.
• Dispose of standing water in plant saucers, buckets, and toys to prevent mosquito development.
• Ensure gutters and storm drains are clear for proper water flow.
• Repair window and door screens in preparation for warmer weather.

These measures could significantly limit mosquito populations as spring approaches.

Community Resources and Support

• Educational Rat Videos: Common Signs of Rats on Your Property, How to Prevent Rats on Your Property and How to Set up a Snap Trap for Rats
• Quick How-to Guide: Safely Store Food for an Emergency
• Still need help with rats or mosquitoes? Sign-up for an inspection of your residence and receive guidance regarding exclusion of rats and mosquitoes from your home.

Thank you for your continued efforts to keep our Orange County community safe from vectors. We wish you and your loved ones a safe, joyful new year ahead!

TO REPORT AN ISSUE REGARDING MOSQUITOES, RED IMPORTED FIRE ANTS, RATS OR FLIES, PLEASE CLICK HERE.