Two bird-sized dinosaurs evolved the ability to glide but 'weren't great at it', study shows

Despite having bat-like wings, two magpie-sized dinosaurs, called Yi and Ambopteryx, only managed to glide clumsily between the trees, say US researchers. https://www.dailymail.co.uk/sciencetech/article-8867801/Two-bird-sized-dinosaurs-evolved-ability-glide-werent-great-study-shows.html?ns_mchannel=rss&ns_campaign=1490&ito=1490