Lehigh Gap Nature Center is hosting Migration Fest, a free all-day family-friendly event on Saturday.

Migration Fest is the center's annual celebration of hawk migration and Appalachian Mountain ecology. The community is invited to this free event to learn about hawks and butterflies migrating along the Kittatinny Ridge and how to identify raptors.The event begins at 8:30 with a guided hike to Bake Oven Knob where the center is conducting the 55th annual hawk watch at 9 a.m. at that site.A beginner's bird walk will be offered at 9 a.m. at the nature center.There will be displays, crafts and critters at the Nature Center's Osprey House from 10 a.m.-2 p.m. and insect safari with monarch tagging at 11 a.m. and 1 p.m.If monarch butterflies are found, participants will have the opportunity to engage in some citizen science by learning how to tag them before they migrate to Mexico. Tagging allows scientists to track monarch migration and monitor their numbers, which many believe are in decline.Migration Fest closes with a talk at 3 p.m. about Pennsylvania's black bears by Mark Ternent, bear biologist for the Pennsylvania Game Commission.