Erratum to: Journal of Bionic Engineering (2024) 21:1–18 https://doi.org/10.1007/s42235-023-00425-y

The author makes the following corrections:

In line 19 of "2.3. Penguin feather" on page 3, “an average inner diameter of 11 ± 4 mm” should be changed to “an average inner diameter of 11 ± 4 μm”.

In the note to Fig. 4g, “the average values of 11 ± 4 mm” should be changed to “the average values of 11 ± 4 μm”.

The original article has been corrected.