Nature Happenings

• Project FeederWatch ends this month, www.birds.cornell.edu/pfw
• If it's an irruptive year, Snowy Owls depart for the Arctic.
• Caspian Tern, Barn Swallows, Purple Martins, Wilson’s Warblers and Common Yellowthroats arrive.
• Red-Breasted Nuthatch courtship behavior begins.
• Kildeer eggs are laid and incubated for 24-26 days.
• Great Blue Heron egg-laying begins in April with incubation lasting 28 days.
• One of the first native butterflies to emerge from its overwintering chrysalis is the Sara Orangetip.
• Rufous Hummingbirds arrive from Mexico.
• Listen for Ruffed Grouse drumming in the lower-elevation mixed woodlands.
• Two beautiful camas species (Camassia Quamash and C. Leichtlinii) are blooming now.
• Cliff Swallows come from southern South America to build their mud nests under eaves and bridges.
• Western Tanagers and Black-headed Grosbeaks arrive from central Mexican forests.
• Lyrids meteor shower, late-April.
• Earth Day, April 22.