About this guide
Effective grey squirrel trapping depends on using the right bait, placed correctly, at the right time of year. This guide covers the food types that attract grey squirrels into cage traps and tunnel trap housings, pre-baiting techniques that increase capture rates, and how seasonal food availability affects how readily squirrels investigate unfamiliar bait stations.
Grey squirrels are omnivores with a preference for energy-dense foods — nuts, seeds, and tree bark in season, supplemented by fungi, insects, birds' eggs, and garden fruit. In a trapping context, this broad diet means a range of baits can be effective. However, success rates vary considerably depending on season, local food availability, and whether squirrels have been pre-conditioned to approach the trap housing before it is set.
Understanding what drives squirrel food choice — and how that changes through the year — makes the difference between a trap that sits untouched for days and one that produces consistent results from the first morning it is checked.
Which Baits Work for Grey Squirrels
Whole hazelnuts and hazelnut paste are consistently among the most effective grey squirrel baits. Grey squirrels have a strong preference for hazelnuts: they are energy-dense, naturally familiar, and highly attractive even to cautious individuals. Hazelnut paste (available commercially or prepared by grinding whole hazelnuts) is particularly useful in tunnel trap housings because it can be smeared onto a wooden surface inside the tunnel, requiring the squirrel to enter fully rather than reach for a loose nut near the entrance.
Other consistently effective baits include: whole dried maize (corn), peanut butter, whole peanuts (unsalted, un-roasted), sunflower seeds, and small pieces of apple. Squirrels will also investigate nest-building materials placed near a trap entrance during drey-building season — though this is more useful as a lure than as a primary bait.
Place bait at the back of the trap housing — not near the entrance. This forces the squirrel to commit fully before the trap triggers, improving capture rates and reducing the chance of the animal escaping before the mechanism fires. For cage traps, secure the bait to the back wall or floor so it cannot be moved to the entrance from outside.
Grey squirrels cache thousands of individual food items per season, relying on spatial memory rather than scent to locate their stores. This scatter-hoarding behaviour reflects their sensitivity to novel food sources — a trait that affects trapping strategy.
— Steele, M.A. et al., Behavioural Ecology, 2001
Pre-Baiting: Conditioning Squirrels to the Trap
Grey squirrels are neophobic — cautious of novel objects in their environment. A newly placed cage trap or tunnel housing will often be avoided for several days, particularly where squirrels have not previously encountered one. Pre-baiting eliminates this wariness by conditioning squirrels to associate the housing with a reliable food source before the trap mechanism is set.
The standard pre-baiting protocol is to place bait inside the trap housing with the mechanism unset for three to five consecutive days before activating the trap. Squirrels that have fed confidently from the housing multiple times will enter more rapidly and completely when the trap is finally set — significantly increasing first-capture rates. Checking and refreshing bait daily during pre-baiting also ensures the bait stays fresh and attractive.
Where traps are being used in an area with prior trapping history, squirrels may already be conditioned — either positively (regularly fed at bait stations) or negatively (previously trap-shy from near-misses). Trap-shy individuals can be more difficult to capture and may require longer pre-baiting periods or different housing configurations.
Seasonal Timing and Food Competition
The effectiveness of bait trapping varies significantly across the year, driven by natural food availability. Spring (March–May) is typically the most productive trapping period: overwintered mast has been consumed, new food sources are not yet abundant, and squirrels — particularly nursing females — are under nutritional pressure. Competition from natural food is low, making bait stations relatively more attractive.
Autumn mast season (September–November) is the most challenging period for bait trapping. When oak and beech are producing heavy mast crops, squirrels have abundant high-quality natural food and are actively caching for winter. Competition from natural food is at its highest, and squirrels are less likely to investigate bait stations when preferred food is available everywhere they forage.
Summer (June–August) sits between these extremes — natural food is available but not at peak abundance, and juvenile squirrels from spring litters are exploring new territories and tend to be less cautious around novel food sources than established adults.
There Are No Licensed Poison Baits for Grey Squirrels
There is currently no rodenticide registered for use against grey squirrels in England. Warfarin-based bait hoppers, which were formerly authorised for grey squirrel control in woodland settings, had their authorisation withdrawn and have not been replaced with an alternative licensed product. Rodenticides must not be used in attempts to poison squirrels — this is both illegal and risks non-target poisoning of other wildlife, domestic animals, and birds of prey.
All grey squirrel control in the UK uses mechanical methods: cage traps or approved spring traps (DOC 200/250, Kania 2000) within covered wooden tunnel housings. Professional pest controllers working in Sheffield and South Yorkshire operate within these legal constraints, using bait and pre-baiting protocols alongside appropriate trap placement to achieve effective results without the use of rodenticides.
Frequently Asked Questions
What is the best bait for grey squirrel traps?
Whole hazelnuts and hazelnut paste are consistently the most effective baits for grey squirrel trapping. Other reliable options include dried maize, peanut butter, whole peanuts (unsalted), and sunflower seeds. Bait should be placed at the back of the trap housing — not near the entrance — to ensure the squirrel commits fully before the mechanism triggers.
How does pre-baiting improve grey squirrel trapping?
Pre-baiting conditions squirrels to associate the trap housing with a reliable food source before the mechanism is set. Grey squirrels are initially cautious of novel objects, and a trap placed in their territory may be avoided for several days. Setting bait inside the unactivated housing for three to five days beforehand significantly increases confidence in the trap and improves first-capture rates once the mechanism is set.
What time of year is best for grey squirrel trapping?
Spring (March to May) is typically the most productive period. Natural food stocks from the previous autumn are depleted, new food sources are scarce, and nutritional pressure on nursing females is high — making bait stations more competitive with natural food. Autumn mast season, when oak and beech crops are heavy, is the most challenging period as squirrels have abundant natural food alternatives.
Can I use poison bait for grey squirrel control?
No. There is currently no rodenticide authorised for use against grey squirrels in England. Using poison to control squirrels is illegal. The only lawful methods are trapping using approved spring traps (DOC 200/250, Kania 2000) in covered tunnel housings, cage trapping with mandatory dispatch of caught animals, and shooting with appropriate firearms. Any caught squirrel must be humanely killed — it cannot be released.
Where should bait be placed inside a squirrel trap?
Bait should always be placed at the back of the trap housing — as far from the entrance as possible. This forces the squirrel to enter completely before attempting to reach the food, ensuring the trap mechanism triggers before the animal can retreat. For cage traps, fix the bait to the back wall to prevent the squirrel from pulling it toward the entrance while remaining outside the trap.
Why do grey squirrels ignore traps sometimes?
Trap avoidance is most common when natural food is abundant (particularly during autumn mast season), when traps have not been pre-baited, when the bait is not fresh, or when a squirrel has had a previous near-miss with a trap and become trap-shy. Moving the trap to a different location along a known run, replacing bait daily, and extending pre-baiting periods can help with reluctant individuals.
How long does it take to catch a grey squirrel in a trap?
With proper pre-baiting and correct placement on a known squirrel run, first captures typically occur within 24 to 48 hours of setting the trap. In spring, well-positioned traps with fresh bait will often catch within the first morning. In mast season or with trap-shy individuals, it may take several days. Traps should be checked at least every 24 hours and bait refreshed as needed.