Quiz 42: More topography of the upperparts

Here is another quiz showing a bird viewed from behind, with questions about the feather groups that are visible. Notice how the contours of the back define the feather groups.

Photo copyright David Sibley

[mtouchquiz 48]

3 thoughts on “Quiz 42: More topography of the upperparts”

  1. David,

    It looks like question 4 points to what many of us refer to as tertials. Technically, they are inner secondaries, but my first impulse was to look for tertials… Great quiz, as always! ~Matthew

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