Table 1. List of species, their call types and frequency range.

Species/call type	Observed frequency range (Hz)
North Island brown kiwi
male	500–8,000
female	500–6,500
Ruru
trill	500–8,000
more	500–2,000
pork	500–2,000
Kakapo
booming	0–800
chinging	1,000–12,000

We use the common names given by researchers for the different types of calls.