The economies that the beetles can gain by suitably adjusting their positions within the group, are important when individuals swim against the flow of a stream. Come and explore what our researchers, curators and education programs have to offer!

If a predator such as a bird approaches from above, the beetle dives below the water. Males are also more likely to be found on the outside of groups (although grouping is not known to be relevant to mating behavior in this family). About five species occur in the Sydney region.Whirligig beetles feed by capturing and eating dead or injured insects on the water surface with their elongated front legs. Whirligig beetles aggregate in the daytime into dense single-and multispecies groups (‘rafts’) of hundreds or thousands of individuals. Other behaviours and adaptations.

The Whirligig Beetle is found in eastern Australia.There are around 1,100 different species in the whirligig beetle group but relatively few of these (20) are found in Australia. Unfortunately, life at the surface exposes the pleustonic animal to aquatic or underwater predators, especially when they are silhouetted against the sky.

In this section, explore all the different ways you can be a part of the Museum's groundbreaking research, as well as come face-to-face with our dedicated staff. In general the adults occupy areas where water flows steadily and not too fast, such as minor rapids and narrows in leisurely streams. The combination constitutes a survival strategy that helps them to avoid predation and take advantage of mating opportunities. You have reached the end of the page.

Like most predacious diving beetles, the adults find water by flying.Whirligig beetles are among the most specialised beetles for living in and on water because all their legs are modified into flat paddles and their eyes are split to give both underwater and above-water vision. Its back legs are like flattened paddles. Most species also can fly well, even taking off from water if need be. They are known for the bewildering and rapid gyrations in which they swim, and for their gregarious behavior. Join us, volunteer and be a part of our journey of discovery!

The water striders and whirligig beetles prey on organisms stuck to the water surface by the adhesive properties of the water molecules. The Australian Museum is closed to the public until Spring 2020 to enable a major renovation. The determination of forward/backward positioning within a group has been found to be affected in a complex manner by a combination of water speed, sex of the beetle, and the type of predator (bird or fish) that a beetle has most recently observed.The beetles could use the waves generated by their moving as a sort of radar to detect the position of object on the water surface around them. On the 22km shoreline of Lake Itasca in northern Minnesota, these aggregations were on the average 0.8 km apart, and they were usually found day after day in the same ocations. By swimming behind other beetles they can take advantage of forward-moving drafts. The positions that individuals occupy within a group are determined by a number of factors, thought to include hunger, sex, species, water temperature, age, parasite level and stress level.

The Gyrinidae are surface swimmers for preference. The compound eyes are remarkable for each being divided into a higher part that is above water level when a beetle is floating passively, and a lower part that is below water level.The Gyrinidae are surface swimmers for preference. They are known for the bewildering and rapid gyrations in which they swim, and for their gregarious behavior.

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