Pigeon spikes vs ultrasonic: which job is which
Updated: October 2026
You can buy a sound box this afternoon, or you can stop the pigeon landing on the sill. Those are different jobs. An ultrasonic bird repeller does not remove a ledge. Square-cut spikes, a wire and a taut net can, if they do not trap the bird or damage the wall. This page is the method choice, not a fitting manual. Peter F. set it out on 16 October 2026 from UK wildlife guidance. The boxes are listed on the [ultrasonic bird repeller comparison](/hub/pest-control/ultrasonic-bird-repeller). None of those ASINs is a spike or a net.
You can buy a sound box this afternoon, or you can stop the pigeon landing on the sill. Those are different jobs. An ultrasonic bird repeller does not remove a ledge.
You can buy a sound box this afternoon, or you can stop the pigeon landing on the sill. Those are different jobs. An ultrasonic bird repeller does not remove a ledge. Square-cut spikes, a wire and a taut net can, if they do not trap the bird or damage the wall. This page is the method choice, not a fitting manual. Peter F. set it out on 16 October 2026 from UK wildlife guidance. The boxes are listed on the ultrasonic bird repeller comparison. None of those ASINs is a spike or a net.
Our top picks
| Badge | Product | What it changes | Reviews | Weather | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  ISOTRONIC ISOTRONIC 70628 1 unit | Sound only, shared pool | 2.6 from 6,144, shared | No IP code | 6.1 | about £32.45 | View offer |
 ISOTRONIC ISOTRONIC 92405 1 unit | Sound only, perch stays | 2.6 from 2,112 | No IP code | 6.4 | about £32.45 | View offer | |
| Preis-Tipp |  bergxperten bergxperten solar IP65 | Solar trial, perch stays | 2.5 from 24 | IP65 claimed | 5.5 | about £22.99 | View offer |
On this page
Two different jobs
A pigeon needs somewhere to put its feet. On a sill, a rail, a parapet or a dish, the landing is a line. In a recess, a light well or the gap under solar panels, the landing is a volume. Ultrasound is sound in open air, and only along a clear path. It leaves the ledge where it was. Reviews in this set often say the bird sits on the speaker.
Natural Resources Wales says ultrasound is not thought to be effective against birds, and it flags a risk to bats. GOV.UK says urban scarers are generally neither effective nor practical. A distress call is a different product. Do not buy one and call it ultrasonic.
If the bird must not land, you are in the proofing column. If it is a dry corner you can live with them staying in, you are in the experiment column. Hearing and weather checks are on the buying guide.
Spikes, wire and netting
Spikes and post-and-wire systems are for a line, such as the outer edge of a sill or a parapet. Natural Resources Wales says tips must be square-cut. Sharpened spikes are the illegal end of that product. Sticky gels that trap birds are illegal too. On a listed building, Historic England wants fixings in the joints, not driven into the face of the masonry.
Netting is for a volume: a balcony recess, a light well, a courtyard corner. GOV.UK’s legal-methods note gives 50 mm as the square-mesh guide for pigeons. If a bird is stuck, the RSPCA helpline is 0300 1234 999.
Historic England says not to install this work while birds are nesting. The legal test is whether a nest is in use or being built, not the month alone. Pigeon rules in more detail are on the ultrasonic pigeon deterrent page.
Where a sound box still gets considered
People still buy a sound box when they cannot face a ladder, or when the mess is in a flower bed rather than on a ledge. In this set that is a temporary try in a sheltered spot with a clear line of sight, no active nest and no bat roost. The bergxperten solar unit is the one with 24 reviews, and those reviews already disagree. The Isotronic pools at 2.6 show short improvements and birds on the housing. A 5.0 from one review is not a reason to prefer a box over spikes.
Do not run ultrasound where bats roost. Do not point a unit at a nest you hope will fail. Using both is reasonable only in a strict order. Proof the landing so the bird cannot sit there. A box, if you still want one, is then an extra in a dry corner.
Which to choose
Choose square-cut spikes or a professionally taut net when the job is a sill, a parapet or a recess that must not be a perch. Spikes or wire for the line, netting for the volume, mesh around the 50 mm guide for pigeons, and no work while a nest is in use. Choose a sound box only as an experiment where you have ruled out a bat roost.
On a listed building, or anywhere you would work at height, ask a contractor. GOV.UK calls proofing usually a specialist job. Buying an ultrasonic listing from this comparison does not start that job.
Common questions
Do spikes work better than ultrasound on a windowsill?
For the job do not land on this sill, yes. Spikes and wire change the perch. An ultrasonic box leaves the sill in place, and reviews here include pigeons sitting on the device. Spikes still have to be square-cut, not sharpened, and they do not suit a nest that is in use.
When is netting the better choice?
Netting suits a volume, such as a balcony recess or a light well, where a line of spikes cannot close the space. Use a taut frame and a mesh that does not let pigeons through. The GOV.UK guide cites 50 mm square mesh for pigeons. Check it so birds are not trapped.
Are sharp spikes legal?
Natural Resources Wales says sharpened tips are not acceptable and that only square-cut tips should be used. Sticky gels that trap birds are illegal as well. Square-cut is a limit on the product, not a promise that a badly fitted run cannot injure.
What mesh size is quoted for pigeons?
GOV.UK’s wildlife-management note says netting mesh should not exceed 50 mm for pigeons, as square mesh. Wider holes let birds through. The same note says poor netting traps birds, so the fit matters as much as the number.
Will proofing trap birds?
It can, if the net sags, if there is a gap at the frame, or if you install it over an active nest. The RSPCA and the RSPB both say you must check netting often. A trapped bird needs help quickly. The RSPCA helpline is 0300 1234 999.
Can I use both a box and spikes?
Yes, if the spikes or the net stop the landing, and the box is only an extra in a dry corner with no bat roost. A box does not make up for a sill you have left open. Do not fit either method on a nest that is in use.
Related pages
Sources
Public UK and wildlife sources from the digest, retrieved 16 October 2026. Shelf prices, stars and review counts are the amazon.co.uk lines in the eleven listings. Prices move. This is not a laboratory test.
- GOV.UK, prevent wild birds damaging your land, farm or business (retrieved 16 October 2026)
- Defra, annex 2, non-lethal alternatives (retrieved 16 October 2026)
- Natural Resources Wales, deterring birds (retrieved 16 October 2026)
- ASA, pest repellents (retrieved 16 October 2026)
- Historic England, bird deterrents (retrieved 16 October 2026)
- Bat Conservation Trust, bats and the law (retrieved 16 October 2026)
- Beason, What Can Birds Hear? (retrieved 16 October 2026)
- RSPCA, pigeons in the garden (retrieved 16 October 2026)