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Our Environment > Our natural environment

Learn about

Animals – noise pollution (barking), poo-llution

It’s natural for dogs to bark at things that make them uneasy or excited, like fireworks, thunder and strangers, but persistent barking can be perceived as offensive noise. Be courteous to your neighbours and monitor your dog’s barking. Sometimes the neighbour may be unaware that their dog is barking...


While some birds in Sydney have adapted to urban gardens and increased in numbers, many smaller birds have been lost from our backyards. As larger species have learned to utilise our more exotic plants, large lawns and supplementary feeding, smaller birds are finding it harder to compete for shelter and food. But you can help bring them back and increase the variety of birds.

Bees and swarms

There are approximately 20,000 species of bees worldwide. Some species may not yet have been discovered, and many are either not named or have not been well studied. The most common is the ‘honey bee’. These bees play an essential role in agriculture by producing honey, beeswax and pollinating a vast number of plants and food crops.

Native plant

Native plants to pot in your garden

Growing local native plants helps to link green corridors for local wildlife such as birds, frogs and lizards. Local plants are better suited to the climate and therefore require less watering. Here is a list of some medium sized shrubs by their common names that are local to the Holroyd area. They all love full or partial sun and...

Why are urban trees important?

Trees provide shade, protection from the wind and improve air quality. They provide a habitat for native animals and play an important role in natural ecosystems, including reducing outbreaks of pests, protecting fragile soils and preventing salinity problems.

Trees also screen buildings, reduce heat and glare from built structures, provide privacy, and improve our streetscape. Aesthetic considerations include an appreciation of the beauty of trees, a connection with the past, and a sense of peace and harmony associated with trees.

Weed management

A weed is a plant growing in the wrong place. Plants can become weeds when the conditions in which they are growing are favourable to their survival.

There are two broad classifications of weeds...


The diversity of our native plants play an important role in keeping our air and water clean. Maintaining this diversity involves looking after our bushland by controlling weeds, bush regeneration and planting, to ensure the natural habitats and vegetation is conserved. Being part of a bush care group is a great way to help improve biodiversity and have fun!


Biodiversity refers to the variety of all life forms such as the different plants, animals, microorganisms, the genes they contain and the ecosystems they form. Biodiversity is critical for the survival of all Earth’s species, including humans. Biodiversity is essential for soil formation, nutrient storage, pollination, reproduction, and pollution breakdown and absorption. But it’s also important for community wellbeing in...

Introduced species

The Indian Myna is a native bird of southern and south-eastern Asia, but has colonised many other areas, such as urban eastern Australia. The World Conservation Union (IUCN) has listed the Indian (or Common) Myna (Acridotheres tristis) among the 100 most invasive bird species in the world.

Summary of the HCC water catchment area

A water catchment is an area where water is collected by the natural landscape. When it rains, water flows into watercourses as stormwater (rainwater plus anything else it picks up along the way) or seeps into the ground and flows into a groundwater system. If you can imagine your hands cupped together – this would be the water catchment, and the creases in your hands would be the watercourses or creeks!