Pen + ink sketch and found midterm exam

Another from my sketchbook. Pen and pencil sketch on the left. On the right is a midterm exam from an old notebook I found. If anyone could please “Define, explain, or comment briefly but adequately” on Pigeon’s milk (number 30) for me that would be amazing. I really need to know more about Pigeon’s milk. Please advise. For science.

Y’ALL FOR REAL WHAT’S UP WITH PIGEON MILK.

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