For 20 years, the Australian Geographic Nature Photographer of the Year competition has provided a platform for emerging and established photographers to capture the most remarkable flora, fauna, and landscapes of Australia, New Zealand, Antarctica and New Guinea.

This year, National Archives of Australia is showcasing 20 Years of Australian Geographic Nature Photographer of the Year with winning entries from each year of the competition.

Images range from the eye of a firestorm captured by last year's winner Samuel Markham to 2016 winner Matthew McIntosh's macro shot of mosquitoes feasting on the forehead of a tree frog, to the 2010 winner Glenn Ehmke's face-off between a Gentoo penguin and an elephant seal.

Visitors can explore how photographic techniques have evolved over the past two decades, from when digital cameras were limited to one category to today's advanced technologies like smartphones and drones.

This free exhibition showcases shifts in focus and themes, illustrating how photography is a powerful medium for capturing and understanding our natural world.

20 Years of Australian Geographic Nature Photographer of the Year is a South Australian Museum exhibition supported by Australian Geographic and Dr Stuart Miller AM.

Banner image: 2006 – Overall Winner. Rainforest dragon (detail). Photographer: Stanley and Kaisa Breeden.