A wildlife charity is to meet highway chiefs to discuss how a road expansion scheme might affect a rare bird.
The RSPB is concerned that proposals to widen a nine-mile (15km) section of the A11 between Norfolk and Suffolk could endanger stone curlews.
The group will tell the Highways Agency that a planned dual carriageway encroaches on the curlew's habitat.
The charity says it aims to work with the agency to minimise the ecological impact of the road's expansion.
Steve Rowland, from the RSPB said: "These roadworks have long been in the pipeline and we certainly recognise their importance.
"We are committed to working with the Highways Agency, making sure that the stone curlew population does not suffer as a result of this work."