Birding expert and author Kenn Kaufman will present a session on the basics of identifying sparrows at 1 p.m. on Tuesday (May 7) at the Ottawa National Wildlife Refuge visitors' center. North American sparrows are tough to see and many species look quite similar. This leads to confused birders, but Kaufman hopes to clear the air on sparrows by demonstrating how to group them by shape, habits and behavior. Once grouped, narrowing down the likely species becomes much easier. There is a $10 fee for the workshop and registration is required.