An airborne highway with rest stops for birds, bees and other insects will be created across Sydney in a bid to help food security and biodiversity.

Animals that help with pollination are declining across the city as their habitats are lost to urbanisation, Judith Friedlander, a postgraduate researcher in sustainability at the University of Technology, says.

The Lane Cove B&B garden is trying to help pollination in Sydney. Credit:Judith Friedlander

"We are not being alarmist when we say we are at a tipping point and the loss of insects can have a cascading impact on food security and biodiversity."

In a bid to tackle this decline the academic set up the FoodFaith B&B Highway initiative, which aims to develop strategically located gardens or B&B rest stops for pollinating animals across the city.