Breeding season is in full swoop for magpies, plovers and many other native birds and these protected animals may become aggressive if they feel threatened.
The NSW National Parks and Wildlife Service (NPWS) reminds people to avoid territorial birds in the coming weeks, as their behaviour should mellow by October.
All native species are protected and anyone concerned about an aggressive bird should contact their nearest NPWS office or call 1300 361 967.
Measures people can take, and should teach children, include to:
* not provoke the birds
* hold an umbrella or stick above your head to deter swooping
* avoid and hurry past nesting sites
* wear a hat
* if on a bike dismount to avoid falling off and move away quickly
* control dogs within 100 metres of nests
* warn others about bird territories