August 5. Today, we walked in the Mt Lofty Botanic Gardens in the hills to the east of Adelaide. It was one of our coldest days with the daytime temperature hovering around 3°. But the sun was out and that was enough to make it pleasure.
The Mount Lofty Botanic Garden, established in 1857, is a 97 ha area covering native forest as well as sections of European trees and flowers such as rhododendrons, azaleas and daffodils. We were a few weeks early for the spring flowering. It is interesting how the English immigrants wanted to replicate their beautiful home gardens in this new continent. In the nearby suburb of Stirling, if you bought built a new house you were required to plant deciduous European trees such as maple, ash and oak in order to create an autumn show. Adelaide gardens are filled with roses and huge camelia bushes.
The English also brought their birds because they thought the local birds did not sing well enough or that birds they were familiar with would solve an agriculture problem. Blackbirds, song thrushes, skylarks and goldfinches were introduced. Most of the species died out or are now only found in limited areas. They were not able to adapt to the hardness of the Australian climate. Blackbirds have survived in urban Adelaide gardens: one sings in our valley.
The most catastrophic decision was the introduction of the common starling to Australia in the mid-1800s. The idea was that it would feed on local insect pests. Instead, starlings have attacked fruit crops and have caused significant problems for livestock and poultry farmers. In western South Australia people are employed to shoot starlings to try and stop them migrating to Western Australia. If you spot a starling in West Australia you are required to report it and authorities will destroy the bird as soon as possible.
Since we are birdwatchers, we spent some time in the botanic gardens looking for birds. It is noticeable that most of the bird species were found in the native forest on the fringes of the rhododendron-filled valleys. I noticed that the huge blackbutt eucalypts had old burn marks on their trunks. In 1983, the devastating Ash Wednesday fire destroyed more than half of the botanic garden. Eucalypts grow back, English shrubs do not.
We had the garden almost to ourselves, although there were many warnings about the necessity of social distancing. It was not an issue. We got lost and could not find another soul to ask for directions.
On one of the smaller lakes a single black swan was half asleep amongst the lily pads. And I thought: Yes, that is appropriate. After all, we are living through a ‘Black Swan’ event: a rare event, with a severe and widespread impact, unexpected, but obvious in hindsight. The Black Swan event reveals our frailty.