Erickson S-64 Air-Crane Helitanker... Probably the one named "Incredible Hulk". Fighting a fire near the Millbrook Reservoir, Adelaide, South Australia. It has just dropped a load and is turning back to the reservoir for another.
<a href="//commons.wikimedia.org/wiki/User:Peripitus" title="User:Peripitus">Peripitus</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>