<trp-post-container data-trp-post-id='360081'>Yellow-bellied Sapsucker

Open Bird Bucket List ↗

En bref

Migratrice
  • Scientific Name: Sphyrapicus varius
  • Spanish Name: Chupasavia vientre amarillo
  • Family: Picidae
  • Known Nicknames: Yellow-bellied Woodpecker, Sapsucker
  • Average Length: 19–21 cm / 7.5–8.3 in
  • Average Weight: 35–62 g / 1.2–2.2 oz
  • Wingspan: 34–40 cm / 13–16 in
  • Key Feature: Red crown and throat, black-and-white barred back, pale yellow wash on belly
  • Primary Diet: Primarily Sapivore (tree sap), also Frugivore and Insectivore
  • Range: Eastern North America (breeds) to Central America and Caribbean (winters)
  • Habitat: Deciduous and mixed forests, orchards, and wooded swamps
  • Social Structure: Solitary or in pairs during breeding; loosely social during migration
  • Nesting/Breeding: Tree cavities excavated in dead or decaying wood
  • Statut de conservation : Préoccupation mineure (LC)
  • Évolution démographique : Stable

The Yellow-bellied Sapsucker (*Sphyrapicus varius*) is a medium-sized woodpecker that lives up to its name with a pale, yellowish wash on its belly, but its most striking feature is the bold, zebra-like black-and-white barring across its back and wings, paired with a bright red crown and, in males, a vivid red throat. Unlike typical woodpeckers that drill for insects, this species is a master "sap-well" engineer: it pecks neat, horizontal rows of shallow holes in tree bark, then returns to drink the sweet sap and eat the insects trapped within. This unique feeding behavior not only sustains the sapsucker but also creates a vital food source for hummingbirds, squirrels, and other wildlife. A special adaptation includes a short, brush-tipped tongue perfectly shaped for lapping up sticky sap, and it often migrates south for winter, making it the only migratory woodpecker in its North American range.

Faits amusants

The yellow-bellied sapsucker is a master carpenter of the forest, drilling neat rows of shallow, rectangular holes in tree bark—not to find insects, but to create a sap well that it returns to repeatedly, licking up the sweet flow with its brush-tipped tongue. This behavior is so reliable that other animals, including ruby-throated hummingbirds and squirrels, have learned to follow sapsuckers to steal sips from their wells. As a quirky adaptation, its tongue has stiff, hair-like projections that work like a mop to soak up sap, and it rhythmically drums on metal objects like gutters and downspouts in spring, producing a loud, staccato Morse code that can be heard for blocks, likely because the metal amplifies its territorial call.

Habitats et répartition

The Yellow-bellied Sapsucker primarily inhabits deciduous and mixed forests, favoring young, second-growth woodlands with a high density of trees like aspen, birch, and maple. It is particularly drawn to areas with dead or diseased limbs, which are easier to excavate for sap wells. Its breeding range spans across Canada from eastern British Columbia to the Maritime provinces, and south into the northeastern United States and the Appalachian Mountains. During winter, it migrates to the southeastern United States, the Gulf Coast, Mexico, and Central America, occupying open woodlands, forest edges, and even suburban parks where suitable trees are available.

Comportements & Reproduction

The Yellow-bellied Sapsucker is generally solitary or found in mated pairs, defending small nesting territories during the breeding season. Courtship involves drumming, vocalizations, and ritualized head-swaying displays, with pairs often reuniting year after year at the same nesting site. Monogamous for the season, both sexes excavate a new cavity each year in a live tree, typically choosing a tree with fungal heart rot to ease digging. The female lays 4–7 white eggs, and both parents share incubation duties for about 12–13 days, then cooperatively feed the young. A unique reproductive strategy is their reliance on sap wells; adults feed nestlings a mix of insects and sap, and the young fledge at around 25–29 days, remaining dependent on the parents for several weeks while learning to drill their own wells.

Alimentation

The Yellow-bellied Sapsucker is primarily a sap specialist, drilling neat rows of shallow holes, called sap wells, into the bark of over 1,000 tree species, favoring birches, maples, and aspens. It uses its brush-tipped tongue to lap up the sugary sap that flows from these wells, which constitutes the bulk of its diet, especially during spring and early summer. A fascinating aspect of its feeding behavior is its role as a "keystone species": the sap wells it creates are regularly visited by other birds (like hummingbirds and warblers), butterflies, squirrels, and even bats for a free meal. During the breeding season, it also supplements its sugary diet with insects, spiders, and ants, which provide essential protein for growing chicks, and in fall and winter, it will eat berries, nuts, and tree buds when sap flow diminishes.

Couleurs

The Yellow-bellied Sapsucker has a black-and-white barred back and wings, a white wing patch, and a pale yellow wash on its belly. Its head features a red crown and, in males, a red throat, bordered by bold black and white stripes on the face. This pattern provides disruptive camouflage against tree bark, while the white rump is a flash marking visible in flight.

Distribution Map

Places linked to this species. A sighting is never guaranteed.