Large Birds of Manly Dam

Manly Dam catchment comprises a variety of vegetation communities such as Peppermint Angophora Forests and Silvertop Ash-Brown Stringybark Forests, which harbour trees mature enough for hollows to form. These hollows are excellent for nests. However, large wildfires in the area have meant that the number of large hollows is few, resulting in competition amongst many hollowing species in the catchment (Law 2021). These urban bushlands provide essential food sources for both large herbivorous and predatory birds and an important place to breed and raise young in such an urbanised area.

How are hollows formed and why are they important?

Hollows are essential for many birds, significantly larger species, but how are they formed?

  1. Once a tree is over 100 years old, it is at an age that it can produce hollows. Trees younger than this are commonly too small to provide an appropriate hollow and are also resilient and healthy to factors that cause hollows to occur.

  2. After the tree section is exposed, the bark and tissue of the tree are broken down because of exposure to mould, insects and other factors.

  3. Eventually, when big enough, birds and other arboreal mammals move in. They enlarge the hollow even further with their beaks and claws.

Hollows are so valuable in urban landscapes. They provide safe nesting space for so many animals. In addition, mature trees must be maintained in urban landscapes so that vulnerable birds and arboreal mammals can breed. 

Meet some of the large birds of Manly Dam Catchment

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Small Birds