Question

Why wings of birds like ostrich and emu have become weak?

Answer 1

Answer:

Dont know this answer

Explanation:

because emu is weak

Answer 2

Answer:

Flightless birds are birds that through evolution lost the ability to fly.[1] There are over 60 extant species,[2] including the well known ratites (ostriches, emu, cassowaries, rheas and kiwi) and penguins. The smallest flightless bird is the Inaccessible Island rail (length 12.5 cm, weight 34.7 g). The largest (both heaviest and tallest) flightless bird, which is also the largest living bird, is the ostrich (2.7 m, 156 kg). Ostriches are farmed for their decorative feathers, meat and their skins, which are used to make leather

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