 This is due to them often being heard, but not seen as they live amongst the tree canopies and rarely feed on the ground.Their conversational song is also relatively indistinct (raspy calls) compared to other small bird species, making them further difficult to identify.Additionally, brown creepers were once included in their own genus, Finschia, but this was later changed as it was found the species shared similarities with yellowhead and whitehead within the Mohoua genus.