Question

question 25
in duck wing plumage, a speculum is:

a type of feather
a colored patch on the wing
a muscle
a bone

Explanation:

In ornithology (a subfield of Biology, which is part of Natural Science), the speculum in duck wing plumage refers to a distinct, colored patch on the wing, typically used for species identification and display. The other options (a type of feather, a muscle, a bone) do not align with the definition of a speculum in this context.

Answer:

B. A colored patch on the wing