Donald and Daisy, and Molt and Bubbles have already mated. Olive and Popeye had shown signs of sexual engagement last month

Molt, Bubbles, Donald and Daisy have put an end to the will-they-won't-they conundrum. These Humboldt penguins at the Byculla zoo have mated despite the authorities initially assuming that they were too young to mate. The penguins are believed to be aged between 2.5 and 3 years, while the ideal age for mating is 3.5 years. BMC sources said Molt and Bubbles have mated, as have Donald and Daisy. Dr Sanjay Tripathi, zoo director, said, "We believe two pairs have mated." But unless eggs are laid, we can't be certain.