Crocuses are blooming, spring peepers are peeping and the birds are starting to feel the approach of spring. Increasing daylight helps trigger changes among many of the birds that are widely considered signs of spring.

Among the other harbingers of the season are several species that have gained reputations for signalling the transition from winter into spring by their presence alone.

Here are some of the top candidates among our feather friends for the honor of being a genuine symbol of spring’s imminent arrival.

American robins
Robins are widely considered harbingers of spring. They appear to become more common overnight, but for the most part, it’s only a shift in behavior.
While robins are present in winter, they shift from eating berries in large, quiet flocks to foraging for worms on lawns in smaller groups as the ground thaws. With increasing daylight, they also begin to feel the urge to partner with potential mates. The robin’s song, often interpreted as “cheerily, cheer up,” is a distinct sound of early spring and is used to signal availability to those prospective mates.

Wilson’s snipe
The snipe, a type of shorebird, is a real bird despite a common belief that this bird, the subject of futile snipe hunts, is mythical. Haunting wetlands with their distinctive “winnowing” (drumming) courtship flights, they are heralds for the advancing spring season. These migratory, long-billed shorebirds typically reappear in marshy areas and wet pastures in early spring, often arriving by early March to begin breeding in northern regions. While some individuals may winter in warmer parts of the United States, their widespread arrival and intense courtship activity are widely recognized as a sign of spring.

American woodcock
A snipe relative, the American woodcock is a premier, early-spring harbinger known for its dramatic “sky dance” courtship displays performed at dawn and dusk, often commencing as early as February or March. On the ground, the male produces a loud, buzzing, nasal sound — frequently described as “peent” — roughly every two seconds. These birds have a long bill equipped with a flexible tip, perfect for foraging for earthworms after the spring thaw has lured them to the earth’s surface. Males put on impressive display flights, using specialized wing feathers to produce a strange twitter as they descend back to earth in wide spirals. Other nicknames for this most unusual shorebird are timberdoodle and bog sucker.

Eastern phoebe
Eastern phoebes belong to the flycatcher family and are among the earliest migratory birds to return to their breeding grounds, often arriving before many other species. Eastern phoebes are more reliable indicators of the actual start of spring migration than American robins because they fly north to catch bugs while robins often overwinter and get a head start without even migrating. Henry David Thoreau detailed spring arrival for many species around Walden Pond in Concord, Massachusetts, in the 1850s. He recorded the Eastern Phoebe arriving in early April and the Eastern Wood-Pewee in late May. Across the migration data for 22 consistently observed species in Concord’s historical bird data, the average timing of spring arrival has not changed significantly from Thoreau’s time to the present. However, there are a few exceptions, such as yellow warbler and Baltimore oriole, that now return to Walden significantly earlier than when Thoreau observed them.

Eastern bluebird
Bluebirds are a widely recognized early harbinger of spring, often arriving in northern locations by February or March, signalling the end of winter. Seeing bluebirds in pairs, checking out nesting boxes or perched on low branches in open, rural areas are classic signs of early spring. The well-known writer and naturalist Henry David Thoreau famously wrote that the bluebird “carries the sky on his back,” documenting their arrival as a vital seasonal marker in Northern regions and Canada. Locally, many bluebirds overwinter, but they still begin exploring potential nest locations in early spring, often as early as February.

Turkey vulture
The return of turkey vultures is a significant, early sign of spring in many parts of North America, often appearing between February and March. As migratory scavenger birds, they return north to feed on animals that perished during the winter, often appearing in flocks. Hinckley, Ohio, celebrates the annual return of turkey vultures (locally called buzzards) to the Hinckley Reservation every March 15, a tradition dating back to 1957. Known as “Buzzard Day,” this event features a pancake breakfast, vendor fairs and spotter-led viewing of the birds returning to their roosts.

Louisiana waterthrush
Birders usually have to wait until April and May for most warblers to venture back to East Tennessee. The Louisiana waterthrush is a premier, early-arriving harbinger of spring in Eastern North America, often appearing in early March along fast-flowing, wooded streams. Known as one of the first migrant warblers to return, their arrival is signaled by a loud, ringing song that mimics the sound of rushing water. They typically arrive on breeding grounds weeks before many other migrant species, particularly other warblers. The loud, ringing song of the Louisiana waterthrush is often heard near streams before leaves have fully returned to the trees.

Blue-gray gnatcatcher
This tiny bundle of feathers is an energetic, noisy songbird that arrives in the region in the final days of March. I often hear this bird’s raspy, scolding vocalizations before I detect their nonstop movements in newly-emerged leaves. They don’t arrive quite as early as the other birds on this list, but I’ve always held this bird as one of my personal birds of spring. Once the feisty blue-gray gnatcatcher is back, the spring season can truly commence. The gnatcatcher, which is one of our smallest birds, feeds on more than gnats. The only local birds as comparably small as the gnatcatcher are kinglets and hummingbirds.

What bird do you look forward to seeing again every spring? What’s something provided by nature that provides assurance that spring is just around the corner?

Feel free to write to me to share your answers by emailing ahoodedwarbler@aol.com.