Dunedin City Council marketing manager Graham McKerracher said the two banner designs, one featuring albatrosses and the other featuring kereru and tahou (waxeye), were new this year.
The banners, which were placed around the central business district, were replaced every three years.
The previous banners featured a beach theme, which centred on swimmers and beach balls.
The new banners were designed by local graphic designer Alex Gilks, and made in Dunedin by Adams Flags last month.
The 250 new banners cost $23,750 to produce.