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CSS Zoology QUESTION #1352
Question 1
The portion of the digestive tract of a pigeon that produces 'pigeon's milk' used in feeding young is the:
  • Proventriculus
  • Gizzard
  • Crop✔️
  • None of these
Correct Answer Explanation
The crop is the enlarged pouch in the oesophagus of pigeons and doves. During the breeding season, the crop lining of both parents proliferates under the influence of prolactin to produce 'pigeon milk' — a protein- and fat-rich secretion regurgitated to feed nestlings. The proventriculus is the glandular stomach and the gizzard is the muscular grinding stomach.