New York has passed a bill that updates the city’s building code with requirements to make new glass structures safer for migratory birds.
New York City Council’s bill requires the surface of new glass buildings rising 75 feet (23 metres) or more – approximately seven storeys – to be patterned to make them more visible to birds.
The bill includes a set of bird-friendly design and construction guidelines that advise the use of fritted glass – which features ceramic lines or dotted marks on the surface. This adaptation would reduce the transparency of clear glass buildings, making them more visible to birds.
Existing glazed towers are not affected by the new mandate but any renovations are required to comply. New structures built on top of a green roof, no matter the height, must meet new requirements. (21-12-19 Dezeen, Bridged Cogley)
bird friendly handbook: https://nextcity.nl/downloads/