With spring on the horizon, dozens of guided bird walks on Long Island are being sponsored by local Audubon Societies and New York State Parks.

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Hooded mergansers are distinctive diving ducks that can be seen on Long Island's shores in winter and early spring before they migrate north.

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March is the season for viewing ducks such as this greater scaup, a medium-sized diving duck.

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A great-crested grebe is a possible find on the March 5 bird walk with the Eastern Long Island Audubon Society Nature Walk at Morton National Wildlife Refuge in Noyac, when Long Island's shores teem with waterfowl.

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March abounds with great birding for waterfowl such as this northern shoveler, and a likely sight on the March 5 bird walk with the Eastern Long Island Audubon Society Nature Walk at Morton National Wildlife Refuge in Noyac.

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Downy woodpeckers are a likely find on the March 20 bird walk in Caleb Smith State Park Preserve in Smithtown.

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Titmice are a spring arrival and likely to be seen on the May 8 birdwalk in Connetquot River State Park.

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The great horned owl is nocturnal and can be seen at the end of the day, and hopefully on the evening of the Great South Bay Audubon Society's nature walk at Connetquot River State Park Preserve on April 23.

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Bluebirds can be seen in spring such as on the bird walk in Connetquot River State Park in Oakdale on May 8.

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Pine warblers are a spring arrival and a likely sight on the May 8 bird walk in Connetquot River State Park in Oakdale.

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A white-breasted nuthatch favors woodsy locales such as the March 20 bird walk in Caleb Smith State Park Preserve in Smithtown.

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