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