Deterring crows is a topic that concerns garden owners, farmers, and city dwellers alike. These highly intelligent corvids cause noise in the early morning hours, raid trash cans, damage lawns while searching for grubs, and can cause considerable damage to fruits and vegetables. Magpies are also criticized for occasionally raiding the nests of smaller songbirds. However, both crows and magpies are protected under the Federal Nature Conservation Act – not every deterrent measure is therefore legal. In this guide, you'll learn which methods are permitted and which actually work.
Crows and Magpies: Protected Corvids
Before you deter crows, you should know the legal situation:
- Nature conservation status: All European corvids – carrion crows, rooks, jackdaws, magpies, jays, and ravens – are protected under the EU Bird Directive and the Federal Nature Conservation Act (§ 44 BNatSchG).
- Prohibited: Catching, injuring, killing, and disturbing birds, as well as destroying their nests and eggs, is prohibited.
- Exceptions: In some states, exemption permits for shooting can be issued under certain conditions, such as when significant crop damage is documented. However, this only applies to farmers and hunters, not private individuals.
- Permitted: Deterrence (removal without harm) is generally allowed. This includes visual and acoustic deterrents as well as habitat modifications.
Important: While magpies are considered game in some states, they may only be hunted with a valid hunting license and outside of close seasons. Hunting in private gardens is not permitted for private individuals.
Why Crows and Magpies Come to Your Garden
To effectively deter crows, it helps to understand their motivation:
- Food foraging: Crows are omnivores that feed on insects (grubs, worms), waste, fruit, grain, snails, and carrion. Magpies also eat eggs and nestlings of other birds.
- Trash cans: Open or easily accessible trash cans are a feast for crows. They learn quickly to open lids and tear open garbage bags.
- Compost: Open compost heaps attract crows with food scraps and insects.
- Pet food: Left-out cat or dog food, bird food, and chicken feed attract crows and magpies.
- Lawn insects: Crows dig holes in lawns to reach grubs and other soil pests. While this is beneficial (natural pest control), it leaves unsightly holes.
- Nesting sites: Tall trees, chimneys, and roof structures serve as nesting sites.
Legal Methods for Deterring Crows
Visual Deterrence
Crows are cautious birds that flee from unfamiliar visual stimuli. However, they are extremely intelligent learners and quickly see through static decoys.
Product Recommendation: Flying Hologram Owl for Bird Deterrence
The Flying Hologram Owl is particularly effective against crows and magpies because it mimics a natural predator – the eagle owl. Thanks to the holographic effect and movement in the wind, its appearance constantly changes, minimizing the habituation effect. Hang the owl in an exposed location in your garden, on the roof, or near the problem area. Corvids instinctively recognize bird-of-prey silhouettes and avoid the area.
Acoustic and Electronic Deterrence
Acoustic methods use sounds that crows interpret as warning signals:
- Play warning calls: Recordings of crow distress calls can be played through speakers. Crows respond strongly to the fear calls of their own species. However, use the calls only strategically and not continuously, as neighbors might be disturbed.
- Ultrasonic devices: High-frequency tones can irritate crows and make the garden an unattractive place to stay.
Product Recommendation: Ultrasonic Animal Deterrent
The Ultrasonic Animal Deterrent emits frequencies unpleasant for birds and works well as a comprehensive complement to visual deterrents. The weatherproof device is simply placed in the garden and covers a large area. The changing frequency patterns make habituation difficult – an important factor when deterring intelligent corvids.
Habitat Modification
The most sustainable way to keep crows and magpies away is to reduce the factors that attract them:
- Secure trash cans: Use trash cans with tightly closing lids. Secure the lid with a bungee cord or special can lock if needed.
- Cover compost: Cover compost heaps or use closed composters. Dispose of food scraps only in sealed containers.
- Don't leave pet food out: Feed pets indoors and immediately remove leftover food.
- Adjust bird feeding: Use bird feeders with small openings that are too narrow for crows and magpies but accessible to small birds.
- Protect fruits and vegetables: Cover beds and fruit trees with bird netting.
- Maintain your lawn: Control grubs in your lawn to remove the food source for crows. Nematodes against grubs are a biological solution.
Crows and Magpies: Are They Really Harmful?
Despite their bad reputation, crows and magpies serve important ecological functions:
- Pest control: Crows eat large quantities of pests – grubs, wireworms, snails, and mice. Their digging activity in lawns indicates a soil pest infestation.
- Seed dispersal: Corvids spread seeds and nuts, contributing to reforestation.
- Cleanup service: As scavengers, crows remove dead animals and prevent disease spread.
- Ecological balance: Studies have shown that populations of small songbirds are not significantly reduced by magpies and crows. The decline in songbird populations has other causes (habitat loss, insect decline, pesticides).
Before undertaking elaborate deterrent measures, it's worth considering whether the damage actually is serious or whether peaceful coexistence is possible. In many gardens, the benefits of corvids outweigh the drawbacks – they keep snails, grubs, and mice in check and remove carrion.
Crow Communities: Why Do They Come in Masses?
Especially in cities, crows form large communal roosts that can include hundreds or even thousands of birds. These communities gather in the evening hours on tall trees, roofs, or in parks, causing considerable noise and soiling.
The reasons for these mass gatherings are diverse:
- Protection from predators: In a group, individual risk is lower. Large groups can more effectively defend against birds of prey like hawks and owls.
- Information exchange: At the roost, crows share information about abundant food sources. Successful foragers are followed by other crows the next morning.
- Warmth: Sitting close together, crows lose less body heat – particularly a survival advantage in winter.
- Urbanization: City trees offer protection from wind and lighting keeps nocturnal predators away. Additionally, cities are significantly warmer than surrounding areas in winter.
Against such mass gathering sites, individuals can do little. Here, municipal measures are needed, such as targeted tree care or redesign of green spaces. For your own garden, focus on reducing attraction factors and using deterrents at critical locations.
Magpies in the Garden: Special Challenges
Magpies cause different problems in gardens than crows and sometimes require modified countermeasures:
- Songbird nests: Magpies occasionally raid the nests of smaller birds. Provide songbirds with protected nest boxes with small entrance holes (26–32 mm) that are too small for magpies.
- Stealing chicks: Magpies can snatch chicks from open nests. Dense hedges and thorny shrubs offer songbirds natural protection.
- Shiny objects: Contrary to popular myth, magpies don't steal shiny objects. Studies have shown that magpies actually tend to avoid unfamiliar shiny objects.
- Garden fruits: Magpies can cause damage to cherries, berries, and other fruits. Protect ripening fruits with fine-mesh bird netting.
The same principles apply to magpie deterrence as to crow deterrence: Combine visual deterrents like the Hologram Owl with Ultrasonic Animal Deterrent and reduction of food sources. Since magpies are as intelligent as crows, varying your methods is also crucial for long-term success.
Crows on the Roof: A Special Challenge
Crows use roofs as vantage points, sleeping sites, and occasionally for nesting. On flat roofs, they can also damage roofing with their powerful beaks. For roof deterrence, the following are particularly suitable:
- Ultrasonic devices at the roof edge
- Hologram owls at the roof ridge
- Bird deterrent spirals at particularly popular landing spots
For more information on bird deterrence on buildings, see our guides Bird Deterrence for Roofs and Facades and Keeping Pigeons off Your Balcony.
Frequently Asked Questions (FAQ)
Am I allowed to shoot crows?
No, as a private individual you are not allowed to shoot crows. In some states, hunters can obtain exemption permits under strict conditions if significant agricultural damage is documented. Shooting crows in a private garden is generally prohibited and subject to fines.
Why do crows scream so loudly in the morning?
Crows are social animals that communicate in large groups. Morning calls serve to coordinate the group, mark territories, and warn of dangers. It becomes particularly loud near communal roosts where hundreds or thousands of crows gather. Deterrent measures that make the roost unattractive in your area help reduce noise.
Are magpies responsible for the decline of songbirds?
No. Although magpies occasionally eat eggs and chicks of other birds, extensive scientific studies (by NABU and the British Trust for Ornithology) have found no negative correlation between magpie populations and songbird stocks. The decline in songbirds is primarily caused by habitat loss, intensive agriculture, and insect decline.
How intelligent are crows really?
Crows are among the most intelligent animals on Earth. They can make and use tools, plan ahead, recognize faces and remember them for years, and even draw logical conclusions. This intelligence makes deterrence particularly challenging, as crows quickly see through static decoys and uniform deterrents as harmless. Use variable methods like the Hologram Owl, whose appearance constantly changes.
Can I prevent crows from digging up my lawn?
Crow digging in your lawn indicates that grubs (larvae of May beetles, June beetles, or garden chafer beetles) are in the soil. Control the grubs with nematodes (biological method), and crows will lose interest in your lawn. In the short term, you can cover the lawn with fine mesh until grub control takes effect.
Summary: Humane Deterrence of Crows and Magpies
Deterring crows and magpies requires patience, creativity, and consistency. Since these corvids are among the most intelligent animals on Earth, they quickly see through static deterrents. Use variable methods: The Flying Hologram Owl mimics a natural predator and constantly changes its appearance through wind and light. The Ultrasonic Animal Deterrent complements visual deterrence with acoustic signals. Most importantly, reduce the factors that attract them: Secure trash cans, cover compost, and control grubs in your lawn. Also consider the ecological benefits of corvids and weigh whether deterrence is truly necessary or peaceful coexistence is possible.
