What are bird spikes?
Bird spikes, also known as anti-perching devices or bird deterrent spikes, are a humane way to prevent birds from landing and nesting in unwanted areas. They consist of rows of stainless steel or plastic spikes that are installed on ledges, signs, rooftops, and other surfaces. The spikes are approximately 2-3 inches tall and spaced 2-4 inches apart in parallel rows. When birds attempt to land on the spikes, they are unable to get a grip and are effectively discouraged from perching. Bird spikes are commonly used to control pest bird populations like pigeons, seagulls, crows, and starlings that can cause property damage, health hazards from droppings, and other nuisance issues.
How do bird spikes work?
Bird spikes work through simple physical means. The upright spike design creates an uneven and unstable surface that deters birds from grasping onto it with their feet. Pigeons and larger birds require a flat solid surface to comfortably perch. When they try to land on the spikes, there is insufficient space for them to grasp the surface and balance their weight. As a result, they are unable to stabilize themselves and end up sliding off or flying away. The sharp tips are not designed to harm the birds, only to prevent roosting. Bird spikes present an uncomfortable perching deterrent but do not impale or injure birds when installed correctly.
Types of bird spikes
There are a few different types of bird spikes available:
- Plastic bird spikes – Made from UV-resistant polycarbonate or nylon. Durable and economical option.
- Stainless steel bird spikes – Made from rust-resistant stainless steel. Withstand outdoor conditions.
- Flexible bird spikes – Made from thin flexible plastic or stainless steel. Can be installed on curved surfaces.
- Low profile bird spikes – Shorter spikes for tighter spaces. Less visible.
Within these categories, bird spikes come in different lengths, widths, spacing, and base types to suit different bird species and surface areas.
Do bird spikes effectively deter starlings?
Yes, bird spikes can be an effective deterrent for starlings when installed properly. Here are some key points on using spikes to control starling populations:
Starling behavior
- Starlings are social, flocking birds that congregate in large numbers on roosts.
- They seek protected sheltered spots like eaves, ledges, signs for nighttime roosting.
- During daytime, smaller groups will perch on building ledges, parked vehicles, power lines, etc.
- Starlings have a complex vocal range and can be very noisy.
Understanding starling habits helps guide effective bird spike placement. Focus on ledges and perches where they gather.
Optimal spike design for starlings
- 2-3 inch spike height is sufficient for starlings.
- 2-3 inch horizontal spacing between spikes.
- Choose durable stainless steel spikes for long-term use.
- Blend in color to match building facade if desired.
Aim for spike dimensions and spacing that comfortably deters starlings while allowing small songbirds to land.
Key installation tips
Proper installation is crucial for making bird spikes effective and long-lasting:
- Measure area and order enough to fully cover ledges/surfaces.
- Attach securely with screw anchors, adhesives or clips.
- Seal edges with caulk to prevent prying up.
- Install angled spikes on sloped or curved spots.
- Place spikes in continuous rows without gaps.
Ongoing maintenance
Periodically inspect bird spikes for:
- Damage from weathering or birds
- Gaps needing additional spikes
- Secure attachment to surface
Replace damaged sections promptly for best results.
Bird spike effectiveness for starlings
When used appropriately, bird spikes have proven to be extremely effective at stopping starlings and other pest birds. Studies show:
- Up to 80-95% reduction in starling numbers on properties with bird spikes
- Dramatic decreases in unsanitary bird droppings
- Greatly reduced bird noises in the area
Here are some examples of how bird spikes effectively deter starlings:
Ledges, signs, beams
Starlings like to gather on structural ledges and beams for sheltered roosting. Installing spikes along the entire surface prevents them from landing.
| BEFORE | AFTER |
|---|---|
| Ledge with starlings roosting and nesting. | Bird spikes installed to cover entire ledge surface. Starlings excluded. |
Rooftops
Flat graveled rooftops offer ideal starling nesting sites. Spikes make the gravel unstable for nesting and discourage access.
| BEFORE | AFTER |
|---|---|
| Gravel rooftop with starling nests. | Spike strips installed across gravel surface. Starling nesting prevented. |
High-wire cables and poles
Overhead cables and poles provide ideal starling perching spots. Installing bird spikes on these sites deters them from landing.
| BEFORE | AFTER |
|---|---|
| Power line with starlings perched on wire. | Bird spikes attached to wire to prevent perching. Starlings excluded. |
Conclusion
Bird spikes provide an effective, humane solution for deterring pest bird species like starlings from problematic roosting, nesting, and perching. When properly installed over preferred landing spots, the spikes prevent starlings and other birds from gaining a foothold, forcing them to move on. Maintaining the spikes in good order is key. Bird spikes do not harm birds but simply discourage them through natural aversion. This makes spikes highly effective for managing starling populations and reducing associated damage, while being gentle on the birds themselves. For properties plagued by large destructive flocks of starlings, installing well-designed and well-placed bird spikes can greatly resolve the issue.
