Mice

House Mice

Overview

Mice are a common structural pest throughout Florida, frequently invading homes, restaurants, and commercial buildings in search of food and shelter. Small, fast, and prolific breeders, mice can go unnoticed until populations grow, leading to contamination, property damage, and health risks. Their presence often signals deeper issues with exclusion or sanitation.

Identification

The most common mouse species found in Florida structures is the house mouse. These mice are small, typically around 2.5 to 4 inches long (excluding tail), with gray or brown fur, large ears, and long, thin tails.

While less frequent, deer mice and field mice may also enter homes, particularly in rural areas. These species are slightly larger, with more pronounced color contrast and white underbellies.

Mice are nocturnal and very quiet, often detected by droppings, gnawed materials, or faint sounds in walls and ceilings.

Typical Habitats

  • Inside walls, attics, and crawl spaces
  • Kitchen pantries, base cabinets, and storage areas
  • Garages, sheds, and utility rooms
  • Behind appliances or in HVAC systems
  • Under insulation or cluttered areas

Behavior and Seasonal Patterns

Mice are active year-round in Florida’s warm climate. They require only a tiny opening — about the size of a dime — to enter a structure. Once inside, they build nests using shredded materials such as paper, fabric, or insulation.

Mice are omnivorous but favor grains, seeds, and human food waste. They are cautious but curious and will explore food sources nightly.

Damage and Health Risks

  • Chewed wires and insulation, increasing fire hazards
  • Contamination of food and surfaces with droppings and urine
  • Spread of diseases like hantavirus and salmonella
  • Allergens from nesting materials or dander

Legal and Ethical Considerations

Mice are not protected wildlife and may be removed or exterminated as needed. However, humane trapping and exclusion are encouraged, particularly in residential settings or where pets and children are present.

Prevention and Exclusion

  • Seal all structural gaps larger than ¼ inch, especially around utility lines and foundation points
  • Store food in airtight containers and keep trash sealed
  • Reduce indoor and outdoor clutter where mice might nest
  • Use traps in high-risk areas; avoid chemical bait unless professionally managed

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