We’ve had some good rainfall over the past month in coastal New South Wales, and the frogs are no doubt loving it! The following two recordings were made just a few hundred metres apart in the Chaelundi wilderness, northern NSW. Each sample features a different combination of species calling, illustrating that subtle differences in water-depth, flow rate and surrounding vegetation-type create important micro-habitats preferred by certain frog species.
Micro-habitat 1 – Stony creek bed with puddles
The first was recorded along a section of a stony river bed, with small remnant puddles of water – a perfect mini-habitat for at least 8 species of frog which I found there. Stony Creek Frogs (Litoria wilcoxii) were abundant, the bright yellow males seemed to be everywhere I shone my torch (this species is relatively quiet and not heard on the following recording). Almost as numerous were the beautiful and very noisy Red-eyed Tree Frogs (Litoria chloris), their un-musical calls dominating the soundscape. Bleating Tree Frog (Litoria dentata), Dainty Green Tree Frog (Litoria gracilenta), Eastern Banjo Frog (Limnodynastes dumerili) and Crinia parinsignifera also added to the chorus, creating a cacophony of sound.
Micro-habitat 2 – 500 metres upstream, deeper water with reeds
Further upstream, the river was flowing and at a few places deep water with reeds could be found. I set up the microphones a few metres from the river’s edge and recorded the very different sounds of this more marshy habitat. The main species heard on this recording are Litoria peronii, Mixophyes iteratus & Litoria fallax, although Limnodynastes peronii, Adelotus brevis, & Mixophyes fasciolatus were also present.