Glass Collisions

Products & Solutions Database

100 Eleventh Ave., NY, USA ©Christine Sheppard

Search Criteria

Are you a building professional or interested in home windows?

Are you working on new construction/replacing windows or retrofitting existing glass?

Are you working on new construction/replacing windows or retrofitting existing glass?

Company

Product Type

Deterrent/Marker Type

Surface 1 (On the Outside of the Glass)?

Threat Factor

Database Overview

ABC uses Threat Factors (TFs) to indicate the relative ability of materials to reduce collisions. Products with lower TFs are considered more effective at preventing collisions. A TF of 30 should reduce collisions by at least 50 percent and is ABC's upper threshold for categorizing materials as bird friendly. Learn more about Threat Factors.

Note: No window product, including ABC-tested products, can guarantee elimination of window collisions. Results will vary depending on local bird populations, landscape conditions, product used, and building design. In addition, ratings assume that patterns are applied to the outside surface of glass, or that surface reflections do not obscure the pattern.

Product Listing

Insect Screen

Any Insect Screen

Threat Factor: 1

Insect screen is an inexpensive and highly effective solution

ABC Approved: Yes
Marker Type: Physical Screen

Insect screens eliminate problem reflections and reduce impact if a bird does hit a window. If possible, use screens that cover the entire glass area of a window.

Masonry

Threat Factor: 1
ABC Approved: Yes
Marker Type: No Reflection

Stucco, concrete, brick and stone with a matte finish should be safe for birds in any application.

Color: any
Pattern: patterned or smooth

Glass: stained

Any Stained Glass

Threat Factor: 1

Stained glass is usually bird-friendly

ABC Approved: Yes
Marker Type: Low Reflection

Stained glass in general is very bird-friendly, as well as serving purposes of devotion or decoration. There is even photovoltaic stained glass! However, if a stained glass panel is insulated, by mounting an external ‘storm window’, it is important to make sure that reflections from that panel of glass don’t cause collisions.

Pattern: panels entirely comprising pieces of different colored/textured, translucent, non-reflective glass

Eckelt 4Bird V3066

St. Gobain

Threat Factor: 2

Surface 1, orange and black vertical lines

ABC Approved: Yes
Marker Type: Vertical Stripe
Product Line: Eckelt 4Bird

Tested as monolithic panel at Hohenau Tunnel in Austria

Color: Orange/Black
Pattern: 18 mm vertical lines, spacing 100 mm

Collidescape: White

Collidescape

Threat Factor: 3

This window film creates a solid appearance from the outside, but allows views from the inside and can reduce glare and cooling costs while protecting birds.

ABC Approved: Yes
Marker Type: Low Reflection

White Collidescape was one of the first bird-friendly solutions available and there is extensive evidence that it stops collisons almost completely - while still allowing a view out the window.

Color: white
Pattern: Continuous matte surface

Eckelt 4Bird V3048

St. Gobain

Threat Factor: 4

Surface 1, orange vertical lines

ABC Approved: Yes
Marker Type: Vertical Stripe
Product Line: Eckelt 4Bird

Tested as monolithic panel at Hohenau Tunnel in Austria

Color: Orange
Pattern: 6 mm vertical lines, spacing 90 mm

Steel, Polished finish #2B

Any

Threat Factor: 5

dull metal surface

ABC Approved: Yes
Marker Type: polished steel

This metal wall is a mix of steel finishes 2b and 4

Pattern: None

Eckelt 4Bird V3067

St. Gobain

Threat Factor: 5

Surface 1, black vertical lines made of dots

ABC Approved: Yes
Marker Type: Vertical Stripe
Product Line: Eckelt 4Bird

Tested as monolithic panel at Hohenau Tunnel in Austria

Color: Black
Pattern: 18 mm vertical lines, spacing 100 mm

Acopian BirdSavers

Acopian Bird Savers

Threat Factor: 5

ABC Approved: Yes
Marker Type: Vertical Cords

These “Zen Wind Curtains” are easy to install, long lasting and highly effective. The BirdSavers website gives directions to build your own, or order from them from the Acopian BirdSavers website. A lengthy history shows they work extremely well.

Pattern: Vertical Paracord spaced 4"

Viracon Screen 2256 color V901

Viracon

Threat Factor: 6

1/8" horizontal lines, spaced 0.5", 20% coverage

ABC Approved: Yes
Marker Type: Horizontal Stripe
Product Line: Bird Friendly Glass

Tested as IGU, frit, 1/8" horizontal lines spaced 0.5" apart on surface 2, Also on surface 2: low E VE-2M surface . 20% surface coverage

Color: V901 Dark Gray Viraspan
Pattern: Horizontal'1/8" lines, spaced 0.5", 20% coverage