Unsurprising but unfortunate. At this point I'm mainly looking at Detroit, with their proven bear, in hope of getting at least one cub born this year. In 2020-2021, Astra and Laerke weren't announced until January 28 (
Two Polar Bear Cubs Born at the Detroit Zoo - Detroit Zoo), while Columbus, our other proven pair, announced their 2019 birth on November 29 (
Columbus Zoo polar bear Aurora gives birth to cub on Thanksgiving Day). While I'd love if an unproven pair gave birth this year (and many zoos with an unproven mother would understandably not want to announce a birth right away), given the difficulty in breeding polar bears I'm not very optimistic.