Public News Service on MSN3 天
Something to crow about: Technology reduces male chick culling in IN
By Grace Hussain for Sentient. Broadcast version by Terri Dee for Indiana News Service reporting for the Sentient-Public News ...
PBS6 年
Jacanas and Polyandry:
For the male, it usually pays best to compete ... female jacanas weigh 60 percent more than males and can lay many successive "clutches" of eggs in a single breeding season. Once their eggs ...