Two Sydney councils have called for a green Halloween, urging residents to stick to environment-friendly decorations this year.

In a post on Facebook, Willoughby City Council urged people to keep Halloween "fun and wildlife-friendly".

"We love seeing all the spooky, creative decorations pop up in our neighbourhoods this time of year," the post read.

"But here's a small thing to keep in mind: fake spiderwebs, while spooky, can be harmful to birds and other wildlife."

The post warned that animals could get tangled in the decorations or even take them for food and eat them.

"Together, we can enjoy a spooky season without scaring off our feathered and furry neighbours," the post read.

Inner West Council joined the call as well, posting a video to Facebook.

Instead of synthetic

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