On May 9, BHL celebrated 15 years since the launch of the BHL portal. Though the BHL consortium was officially formed in 2006, the BHL website launched the following year with just over 300 titles in the collection. Today, BHL hosts over 176,000 titles, more than 280,000 volumes, and 60+ million pages of biodiversity literature. BHL Program Director Martin Kalfatovic looks back on the momentous launch event with an anniversary blog post.