- Less than 15cm long.
- Males can be identified by the grey crown on their heads, and black throat ‘bib’.
- Females and young are mostly plain brown.
- Sparrows live for four to seven years, with up to five breeding seasons.
- The breeding season runs through Spring and Summer, and up to three broods of 4–6 eggs may be laid in this time.
- The same nest will tend to be used every year, resulting in a build up of nest debris, and insects associated with their nests.
- It is a pest to the food industry in particular because of the risk of contamination from their droppings and the damage done to packaged goods.