The usual butterflies were reasonably abundant – Swamp, Plain and Blue Tigers, Crow, Glasswing, Grass Yellow, Migrant and Argus – but I didn’t come across any aggregations like this over-wintering group. On the other hand, I did see a small group of Oak Blues deep within a group of small trees in a gully on the Many Peaks path.
Oak Blues (I think mine were Shining Oak-blues, Arhopala micale) are amongst the largest and brightest of a family of small butterflies, the Blues or Lycaenidae. I don’t see them very often, so this one is a bit special.
In spite of the common name of the family, nearly all Lycaenidae imitate dry leaves with their underside coloration and few are brightly coloured even on the upper surface of the wing (see them all here).
The most numerous insects on the Common that day were the grasshoppers and green-ants. I also saw a very handsome native cockroach (click here to see it, especially if you don’t believe cockroaches can ever be attractive) and a few dragonflies.
One of the nice things about Townsville is the network of parks threading through the suburbs. Some of them seem to have no particular reason for existence until the wet season arrives and they become floodways for a day or two, but the most important network is associated with Ross River: the parkland along its banks is almost continuous from the Dam down to the city, and bike paths run through most of its length.
The nearest part of Ross River is only two blocks from home and a bike path and a strip of parkland extend several kilometres both upstream and downstream so it’s always good for a walk with a friend and/or a camera.
Waterbirds are common along the river banks. This Great Egret flew in from the direction of Mount Stuart to land in the shallows for a spot of fishing before dark. You can call it either a Great Egret, Ardea alba modesta, or an Eastern Great Egret, Ardea modesta, depending on which authority you prefer to accept. Either way, it is the largest of the four (sub)species and is found from Australasia through SE Asia to India, while the others are found in Africa, Europe and the Americas.
We have several smaller species of egret: Cattle, Reef, Little and Intermediate. All are slim white wading birds but only the Intermediate is large enough to be readily confused with the Great, which stands nearly a metre tall. They often do stand tall, too, e.g. here is my egret looking around before starting to hunt.
Conservation Volunteers Australia has a new summer programme (pdf here) of excursions open to everyone and we went along to one this morning – birdwatching on the Town Common. A CVA worker met us at the park gate and took us or led us, by mini-bus or our own cars, to the bird hides where members of the Bird Observers Club were waiting with identification checklists and telescopes.
It was my first visit to the bird hides on the Common and I was impressed by their siting and construction. From the first of them we saw Pelicans, Black Cormorants and a young Jabiru quite close to us, with the adult Jabiru and some Brolgas in the distance. Here are Black Cormorant (represented by a neck sticking up out of the water) and Pelicans fishing together. The Cormorant are divers while the Pelican spear from above, so each scares prey towards the other – a win-win strategy, except from the prey’s point of view.
From the second, elevated, hide we saw dozens of Cattle Egrets and a scattering of other birds – Glossy Ibis, Jabiru and Brolga, Honeyeaters, Grebes – as in the top picture. I didn’t use my checklist but I know I saw several more species, too.
The children with the group enjoying ticking off their checklist and some of them were very good at spotting birds for us. Right at the beginning, while we were waiting at the gate for the group to assemble, one of them pointed out a family of Tawny Frogmouths – adult and two well-grown chicks – in a pandanus palm ten metres from the road.