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. 2019 May 20;7:e6936. doi: 10.7717/peerj.6936

Figure 4. Feather wear on the trailing edges of adult Magellanic penguins’ flippers.

Figure 4

(A) Normal white feathers on trailing edge of flipper. (B) Worn feathers on trailing edge of flipper. Photo credit: Dee Boersma.