Mnemonic description of calls:
Peah/klee-yer
wik-wik-wik/swik-wik-wik/wick-a-wick-a-wick-a
squeechu-squeechu-squeechu…
What do we know about northern flicker song?
Do not sing.
How and when is vocalization acquired?
Nothing is known about vocal learning, but it is thought that calls are not learned (Wiebe and Moore 2020)
How can we facilitate learning?
No recommendation since calls are likely not learned.
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Resources:
Wiebe, K. L. and W. S. Moore (2020). Northern Flicker (Colaptes auratus), version 1.0. In Birds of the World (P. G. Rodewald, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.norfli.01