Early Spring Wildflowers at Thacher Park. 10 a.m. Woodland wildflowers known as spring ephemerals bloom on the forest floor before the trees leaf out and block the sun. Meet at the Paint Mine picnic area. Call 518-872-0800 to register.

Earth Day Fun Run on the Albany County Helderberg-Hudson Rail Trail on Saturday, April 21. Albany County Helderberg-Hudson Rail Trail. The out-and-back course is appropriate for the whole family and all skill levels. Runners, walkers, joggers, rollerbladers and skaters, and those with a stroller are all welcome to participate. Registration begins at 8:00 AM and the race will start at 9 AM. For more information, and to register early, visit www.mohawkhudson.org.

Watchable wildlife. 10 a.m. While mid-May brings waves of returning warblers and other songbirds, “spring” migration begins much sooner. Bring binoculars if you have them. A limited supply will be available on a first come, first serve basis. Five Rivers EEC, 56 Game Farm Rd, Delmar, NY 12054.

WATCHABLE WILDLIFE:  EARLY EMERGERS on April 7 at 2 pm. Join us for a guided walk to look for the early emerging insects that are both frontline pollinators and an early food source for many animals here at Five Rivers. Five Rivers EEC, 56 Game Farm Rd, Delmar, NY 12054

FAMILY FUN: THE WORLD OF WORMS at 10:00 am. Why are worms so slimy? Why does the early bird get the worm? Join us to learn all about worms and the soil they help make. We will observe earthworms in different environments, take a short outdoor walk, and make our very own worm jars. We will provide some jars, but bring your own if possible. Five Rivers EEC, 56 Game Farm Rd, Delmar, NY 12054

FAMILY FUN: LEAVE IT TO BEAVERS! at 2:00 PM. As winter fades away and spring arrives, come learn about the incredible New York State mammal - the beaver! We will talk about the special adaptations that beavers have in order to survive the winter and take a walk around our Beaver Pond to see if we can see signs of this wonderful animal. Five Rivers EEC, 56 Game Farm Rd, Delmar, NY 12054.

Discover the Pine Bush on Saturday, April 7, from 10:30 am – 12:00 pm.  An extraordinary journey into the Albany Pine Bush – a globally rare, nationally significant and locally distinct inland pine barrens. Our experts will guide you along this 0.9-mile hike over rolling sand dunes where you will discover Pine Bush natural history, seasonal surprises, and transformations. All ages. Free! Location: Albany Pine Bush Discovery Center, 195 New Karner Road, Albany, NY. Fee: Free! Registration required.

Friday Walk and Talk on Friday, April 6, 12:00 pm – 1:00 pm. Take a break from your day and join us for a 1.2-mile hike at Kings Highway Barrens. We will meet at the Kings Highway Barrens trailhead (#9). Adults only. Free! Location: Kings Highway Barrens trailhead (#9) Fee: Free! Registration required. Please sign up by calling 518-456-0655 or visit www.AlbanyPineBush.org/events.

Wild and Wacky Woodcock Walk on Tuesday, April 17, from 7 – 8:30 pm.  Join Albany Pine Bush Preserve Commission staff for our annual hike through the Pine Bush to watch the elaborate flight displays of the American Woodcock. During the mating season in early spring, male woodcocks perform amazing flight displays at dusk. Males circle high in the evening sky then plummet to the earth in a series of zigzags and whistling wings. Remember to bring your binoculars! We will start inside and then continue outside for a 0.9-mile hike. Ages 6+. Free!

Wild and Wacky Woodcock Walk on Thursday, April 5, 7 – 8:30 pm. Join Albany Pine Bush Preserve Commission staff for our annual hike through the Pine Bush to watch the elaborate flight displays of the American Woodcock. During the mating season in early spring, male woodcocks perform amazing flight displays at dusk. Males circle high in the evening sky then plummet to the earth in a series of zigzags and whistling wings. Remember to bring your binoculars! We will start inside and then continue outside for a 0.9-mile hike. Ages 6+. Free!