I went over the difference between
Flightless and flying birds
Reminding them in order to fly
They need to lose what is dragging them
Like weight of extra ovary and oviduts
Urinary bladder is an unnecessary luxury
Or they must develop enough firepowers
In the form of breast muscles
And air sacs to give them buoyancy
Also in flying
And so are interlocked feathers
Yet when I gave them exam
Not everyone could write ten differences
Between Ratitae and Carnitae
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