What specific dietary requirement must be met for egg-laying female thrushes kept in a protected captive environment?
Answer
Sufficient calcium through snails
While captivity eliminates major threats like predation and migration hazards, ensuring longevity requires meticulous replication of necessary biological support systems, particularly concerning reproduction. For female thrushes within a carefully maintained sanctuary or zoo setting, maintaining bone health and enabling successful egg production requires a specific mineral intake. The text emphasizes that to lay eggs successfully, these females require sufficient calcium, which is most effectively provided through their diet in the form of snails.
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