Why are there many mice in the garden this year? - briefly
Mild winter conditions and plentiful garden food—seeds, fruits, and insects—have increased mouse reproduction and survival. Reduced predator presence in the area further enables their population to expand.
Why are there many mice in the garden this year? - in detail
The garden’s mouse population has risen sharply this season due to a combination of environmental and human‑driven factors.
Mild winter temperatures extended the breeding period, allowing several additional generations to develop before summer. Early warming also promoted rapid plant growth, creating abundant cover and food sources.
Abundant vegetation produced a surplus of seeds, fruits, and tender shoots that serve as primary nourishment. Compost piles and mulch provide both nourishment and shelter, protecting juveniles from predators and weather extremes.
Predator pressure has weakened. Declines in raptor numbers, reduced presence of domestic cats, and fewer ground‑dwelling snakes diminish natural mortality rates, allowing more individuals to survive to adulthood.
Garden management practices contribute further. Reduced pesticide applications preserve insects, which supplement the mice’s diet. Bird feeders and fruit trees unintentionally attract rodents, while dense planting creates continuous corridors for movement.
The convergence of these conditions—extended breeding window, plentiful food, ample refuge, and lowered predation—explains the current surge in rodent numbers.
To mitigate the issue, consider the following actions:
- Trim low‑lying vegetation to reduce cover.
- Secure compost bins with tight lids.
- Limit bird‑feeder spillage and clean up fallen seeds.
- Encourage natural predators by installing raptor perches.
- Apply targeted, low‑toxicity rodent control measures where necessary.