All posts by Joe Lipson

About Joe Lipson

I live near Garigal National Park

Camouflaged Gecko

Animals, ,

I was moving an old pile of timber out in the back yard over the weekend, hiding in amongst it were 2 Broad Tailed Geckos. I only actually saw one, which had dropped it tail and run off. I knew there was at least one other as there was a second tail writhing about on the ground. The tails moved as though they were alive, made me wonder if they can drop their tails at will as a diversion when they sense they are about to be preyed upon.

I’d placed my jacket on the ground while I was working, when I picked it up a few hours later this guy fell out! Geckos look cool and I always like to see them, I was extra impressed with how effective it was camouflaged against the natural sandstone.

Grinning Gecko
Camouflaged Broad Tailed Gecko, without (broad) tail

 

Igneous Dyke near Brooklyn

Earth

An igneous dyke is where molten magma has forced it’s way up into a crack between existing rocks. Dykes can extend for many kilometers in lines on the surface.  There’s a dyke marked on the Sydney 1:250,000 geological sheet that cuts across the M1 and old pacific highway just south of the Hawkesbury River. It’s mentioned in the “Geology along state highways” section of The Field Geology of NSW. I’ve tried to spot it many times while driving down the M1, I think I’ve seen it but it wizes by so fast it’s hard to be sure.

dyke
The dyke is the red line striking ESE just south of the Hawkesbury River. Tv stands for Tertiary volcanics, which means the dyke is less than 65 Million years old. Geologically it’s a baby!

Last weekend I went for a ride down the old Pacific Highway and I’m pretty sure I found it.

Pacific Hwy Dyke
Dyke in a cutting beside the old Pacific Highway just south of the Hawkesbury River

It’s a vertical channel about 4m wide that cuts through the surrounding Hawkesbury sandstone. The material in the dyke was heavily weathered and seems softer than the surrounding sandstone.

 

Silvereye

Animals, , , ,

Zosterops lateralis

Another common bird that I’ve only recently identified in the backyard. The Silvereye gets it’s name from the distinct patch of white around it’s eyes. It’s a small bird, only 11cm – 13cm in length, it moves about quickly making it hard to spot and identify. Silvereye live on the coast and adjacent inland areas of almost all of the country, they’re also found throughout New Zealand and southwest Pacific islands including Lord Howe, Fiji and Vanuatu.

Silvereye in the garden

Sources and further reading

Birds in Backyards

Wikipedia

Atlas of Living Australia

New Holland Honeyeater

Animals, , ,

Phylidonyris novaehollandiae

Another ( former ) unknown bird in the yard. It’s a New Holland honeyeater, a not uncommon bird thats distribution stretches from the southern Queensland coast, all the way down the east coast, throughout Tasmania, then westwards following the mainland coast wrapping up a few hundred km north of Perth. They’re small birds reaching a maximum size of 20cm. This one was hard to photograph, it kept moving about, not staying still for long at all.

New Holland Honeyeater – in a tree in the front yard.

Sources and further info

Birds in Backyards

Wikipedia

Atlas of Living Australia