It is unlikely that a hedge of fronded non-native conifers will be much good for wild-life. Won't be anything for them to eat there, though the occasional small bird might make a nest in it. The dead material that falls from it does not rot down easily, and so tends to smother other stuff, and does not encourage invertibrates that birds would use as food. Being shallow-rooted, it sucks water out of the ground and makes it difficult to grow anything else close to it. If you want a hedge for wild-life, you want one with tasty berries, leaves that fall and compost naturally and encourage good bugs.

Western Red Cedar are (one of) the enormous trees you see in British Colombia. It will become a huge tree if you fail to prune it. The prunings do not compost well, and can be irritating to the skin/eyes. Whilst not as fast growing as Leyland Cypress, it is the kind of thing that can make your neighbour hate you if you let it get out of control.

There is a wide range of evergreen shrubs that are much nicer.