Ono and Tamaa were flying to their shared nest after becoming a couple.

 When they landed, Tamaa immediately, but with Ono's full consent, got on his back and penetrated his cloaca, where for an hour he fucked him very hard, with both birds moaning and making loud sqweaks, after Tamaa finished cumming in her Ono's cloaca, Tamaa took the same position as the egret, lowering herself with her wings extended for better balance, and her tail high up, Ono also immediately mounted him and fucked him for two hours. 

Five weeks later both birds became pregnant, even though they were both males, in this case hermaphrodites. Having laid both, two eggs, two of them black with white stripes, and the other two white with black stripes.