Wolf whistling and catcalls are to be classed as misogyny hate crimes by a division of police in the UK in an attempt to tackle sexist abuse.
Examples of such incidents may include unwanted or uninvited sexual advances, physical or verbal assault, unwanted or uninvited physical or verbal contact or engagement, and use of mobile phones to send unwanted or uninvited messages or take photographs without consent.
Nottinghamshire Police defines a hate crime as "any incident, which may or may not be deemed as a criminal offence, which is perceived by the victim or any other person, as being motivated by prejudice or hatred."
Officers and staff currently undergoing training have begun to categorise behaviour targeted towards a victim "simply because they are a woman" as misogynistic crime.
Commenting on the new procedures, introduced in partnership with Nottingham Women's Centre, Chief Constable Sue Fish said: "I'm delighted that we are leading the way towards tackling misogyny in all its forms.
"It's a very important aspect of the overall hate crime work being conducted and one that will make Nottinghamshire a safer place for all women.
"What women face, often on a daily basis, is absolutely unacceptable and can be extremely distressing."
Work on the change began in June 2014 after a research project, which led on to a conference at which victims gave examples of harassment faced by women.
It is also hoped the new rules will encourage more women to come forward and report offences.