Asian hornet: how tits help protect honey bees in March

If you keep beehives in the garden or simply value fruit trees, you may know the concern: as soon as the first warm days arrive, invasive Asian hornets return and hunt pollinators. Many people immediately turn to traps or poison. Yet there is a natural ally that can be encouraged with simple measures – and it works particularly hard in March.

Why March is crucial in the fight against the Asian hornet

After winter, queens of this introduced hornet species emerge and begin looking for suitable sites for their first nests. If they can establish themselves undisturbed, the colony expands rapidly. One colony can consume several kilograms of insects in a year – including large numbers of honey bees and other pollinators.

Anyone who waits until high summer, when large nests are suspended high in trees, has almost already lost the battle. By then, worker numbers are so great that intervention becomes risky, and only professionals wearing protective suits can reach them. The key period comes much earlier in the year, when the first small nests are being formed and there are still relatively few hornets.

Experts agree that this hornet species is now unlikely to be eradicated from Central Europe. It breeds extremely quickly and has very few specialised natural enemies. Although some rare birds eat Asian hornets, they do not do so on the scale required. This makes one animal helper found in almost every garden especially interesting: the tit.

“Bringing tits into the garden early in the year weakens hornet colonies during their establishment phase and therefore protects honey bees in the long term.”

Tits: quiet allies for beekeepers and gardeners

Blue tits, great tits and coal tits are familiar visitors to bird feeders, but their greatest strength becomes apparent in spring. They feed their young almost entirely on insects and larvae. During this period, they bring food back continuously, searching every shrub, crevice and branch.

A single tit can make several hundred feeding trips in one day for its chicks. Over just a few weeks, a tit family eats thousands of caterpillars, grubs and other small creatures. If a hornet nest is within reach, its larvae may also end up on the menu, without the bird having to specialise in hunting them. Every larva eaten means fewer potential new queens later on.

Great tits are particularly notable to biologists. They readily nest close to hornet nesting sites and inspect abandoned nests for leftovers. There, they find dead insects and remaining larvae that might otherwise have served as reserves for the next generation. This reduces the potential for a strong colony to produce many young queens in autumn.

Even so, birds are not a replacement for professional pest control. Tits do not deliberately target hornets; instead, they feed opportunistically when suitable prey is available. Their impact is broader: they reduce numerous pest insects at once, including part of the hornet brood.

How to attract tits to your garden

To make the most of the birds’ abilities, they need appropriate nesting sites and a plentiful food supply. Both are surprisingly easy to provide, particularly when preparations begin early in the year.

The right nest box at the right time

Competition for nesting sites begins in March. Hollows in mature trees have become scarce, so artificial nest boxes can fill the gap. A simple wooden box with a small entrance hole is enough, provided a few details are right:

• An entrance-hole diameter of roughly 2.6 to 3.2 centimetres, allowing tits in while making access difficult for larger species.
• A mounting height between two and five metres, positioned somewhere quiet rather than directly above a patio.
• The entrance should face away from the prevailing weather and avoid intense midday sunshine.
• Provide sufficient protection from cats, so do not place it directly on a trunk that can easily be climbed.

Putting up a nest box before mid-March gives it a considerably better chance of being occupied that same year. Many tit pairs are already searching for suitable nesting cavities at this point.

A garden where insect-eating birds thrive

Nest boxes alone will rarely be enough. Tits need a territory that offers plentiful food as well as shelter. A slightly more ‘untidy’ garden is far more useful than a perfectly manicured lawn.

• In late winter, offer sunflower seeds and nuts. From the end of March, however, feeding stations should gradually be phased out so that birds resume searching more actively for insects.
• Native shrubs such as elder, hawthorn and hazel provide insects, berries and cover.
• A shallow bowl of water or a small basin with regularly refreshed water supports drinking and bathing.
• Leaf piles, dead wood and a slightly wild corner of the garden create insect habitat, effectively becoming the tits’ larder.
• Completely avoiding insecticides is essential; otherwise, birds can be poisoned indirectly through their prey.

“The more vibrant insect life is in the garden, the more active tits become – and the more pressure from pest insects and hornet larvae falls in the long term.”

Combining natural help with professional action sensibly

If you spot a hornet nest in the garden, do not attempt to deal with it yourself. Stings can be very painful, particularly once a nest has grown larger, and they may be dangerous for people with allergies. Specialist services or local authority teams are responsible for safely removing nests in difficult-to-access locations.

Tits do not replace this step; they complement it. While professionals remove large, active nests, the birds reduce the number of larvae and therefore the number of potential young queens. This creates a double effect: fewer large nests in the area, alongside a constant background pressure from birds that slows the spread over time.

What beekeepers and garden owners gain in practice

Honey bees are already under pressure in many regions from disease, pesticide residues and shortages of food. When an invasive hornet species is added to the mix, colonies can easily become unstable. Every factor that reduces predation pressure, even slightly, matters. Tits can make precisely this small but noticeable contribution.

People who distribute several nest boxes around the garden and maintain it in a wildlife-friendly way usually notice changes after only one or two years: more birdsong, fewer aphid outbreaks and shrubs that are less often stripped bare. Even where hornets remain present nearby, their colonies are often weaker because brood is repeatedly removed in spring.

Background: why invasive species are so difficult to contain

Introduced species often have advantages: they face few natural enemies in their new environment, reproduce successfully and exploit gaps in the ecosystem. The Asian hornet hunts very efficiently around beehives and tolerates differing climatic conditions well. This is why it is spreading across Europe so rapidly.

Rather than relying on a single ‘miracle solution’, experts use many smaller levers: wildlife-friendly gardens, support for beneficial species such as tits, appropriate handling of nests and close observation in spring. Together, these measures form a network that noticeably reduces the impact without placing further strain on the ecosystem.

For amateur gardeners, there is also a welcome side benefit. Creating a tit-friendly garden automatically produces a haven for many other species, from wild bees and butterflies to hedgehogs. A simple nest box can therefore become a small contribution to tackling insect decline and bringing more life right to the doorstep.