Thanks to the Australian Museum in Sydney, I've been able to identify this spotting. These are dark periwinkles, a native species of mollusc that's endemic to this area. Size up to 7 mm in length, but commonly 2-3 mm. This spotting shows species in juvenile form and they are tiny! Mass aggregations like this are to conserve moisture, seen here with Austrolittorina unifasciata, aka little blue periwinkles.... https://www.projectnoah.org/spottings/19.... "The colour is variable from dark brown to pale fawn, and from unpatterned to strongly marked. The colour is usually dark brown in the early whorls - hence juvenile shells are dark brown - changing to fawn or light brown on the latter whorls. Shells may be translucent, particularly the lighter coloured specimens." (Seashells of NSW) https://seashellsofnsw.org.au/Littorinid...

Tabanus australicus, also known as horse fly and green head, is a species of insect in the family Tabanidae. As with most biting flies, it is only the female march flies that bite as they need blood to produce the next generation. Needless to say, when they bite, they are ferocious! The males have larger metallic green eyes and feed on nectar. The fly in this spotting was smitten with my car. Once it got in, it did not want to leave!

Thanks to the Australian Museum in Sydney, I've been able to identify this spotting. These are dark periwinkles, a native species of mollusc that's endemic to this area. Size up to 7 mm in length, but commonly 2-3 mm. This spotting shows species in juvenile form and they are tiny! Mass aggregations like this are to conserve moisture, seen here with Austrolittorina unifasciata, aka little blue periwinkles.... https://www.projectnoah.org/spottings/19.... "The colour is variable from dark brown to pale fawn, and from unpatterned to strongly marked. The colour is usually dark brown in the early whorls - hence juvenile shells are dark brown - changing to fawn or light brown on the latter whorls. Shells may be translucent, particularly the lighter coloured specimens." (Seashells of NSW) https://seashellsofnsw.org.au/Littorinid...