TreeSong Nature Awareness & Retreat Center will host a virtual course on corvids, the family of birds that includes crows, ravens and jays, from 6 to 7:30 p.m. July 16. Attendees will learn more about who the corvids are and why they deserve respect, including how to tell such birds apart from one another. Birder Laura Whittemore will lead the course. Whittemore holds a BA in Biology from Lewis and Clark College and has traveled in the US, Australia, South Africa, and Antarctica in search of birds. Tuition is a sliding scale $10 to $20. Registration is required to attend. For more information, visit www.treesongnatureawareness.org.