Thursday, June 10, 2021

Rainbows and Musks

Drouin’s streets, parks and gardens are often visited by flocks of the gregarious Rainbow Lorikeet. It isn’t hard to know when they have arrived – they screech loudly and squabble constantly among themselves and they spend a lot of time chasing off other species.

Rainbow Lorikeets are thought to pair for life

All of Australia’s Lorikeets are nectar and pollen feeders – they have a specially adapted ‘feathery’ tongue for lapping the blossoms of trees and shrubs such as eucalypts, paperbarks and banksias. They do also take some insects, fruit and seeds as part of their diet. Rainbow Lorikeets have been recorded eating meat.

Musk Lorikeets are said to emit a musky odour

Being especially partial to the blossoms of our native trees and shrubs, Lorikeets will often fly long distances chasing the flowering patterns of their favourite species. Lorikeets are described as a nomadic species.

When the Friends of Drouin’s Trees were conducting their bird surveys recently, a noisy flock of rainbows were feeding in some Spotted Gums at the Drouin Golf Course. Among them were some Musk Lorikeets, a slightly smaller and less colourful bird.

Rainbow (left) and Musks (right) at a water bowl

Rainbow Lorikeets are widely distributed across the north of Australia, down the eastern seaboard and across to about Adelaide. Musk Lorikeets are more restricted to the south-east corner of the continent.


Both Rainbow and Musk Lorikeets use tree hollows for nesting and so they are attracted to stands of large gums that contain suitable hollows, a resource that is steadily disappearing in some areas.

 

Tuesday, June 1, 2021

The not so Sweet Pittosporum

 

Sweet Pittosporum, Pittosporum undulatum, is a serious weed outside its area of natural distribution. It establishes quickly and readily competes with other native species. Sweet Pittosporum develops a dense canopy that shades out all understory and drops lots of leaves that may contain an inhibitor preventing indigenous plants from surviving.

 

Sweet Pittosporum is a medium-sized, fast-growing tree with dark leaves, creamy-white flowers and orange fruit. It is an Australian endemic whose original natural range was wet forest areas down the eastern seaboard from southern Queensland to eastern Victoria.


Since European settlement, Sweet Pittosporum has thrived in areas altered by humans, in particular where native vegetation has become fragmented by development, agriculture, forestry, road-making, etc.


 

Although the fruit and flowers provide nutrient for native birds and animals at certain times, the ecology of bushland containing patches of Sweet Pittosporum is noteworthy for its lack of biodiversity.

 

Despite its invasive properties, Sweet Pittosporum is readily available in nurseries and on-line where it is often referred to as Native Daphne.