Kirtland's warbler
| Kirtland's warbler | |
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| Male in Michigan, United States | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Family: | Parulidae |
| Genus: | Setophaga |
| Species: | S. kirtlandii |
| Binomial name | |
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Setophaga kirtlandii (Baird, 1852) |
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| Range of S. kirtlandii Breeding range Winter range | |
| Synonyms | |
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Dendroica kirtlandi (lapsus) |
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Dendroica kirtlandi (lapsus)
Kirtland's warbler (Setophaga kirtlandii), also known as the jack pine warbler, is a small songbird of the New World warbler family (Parulidae), named after Jared P. Kirtland, an Ohio doctor and amateur naturalist. Nearly extinct just 50 years ago, it is well on its way to recovery. It requires large areas (> 160 acres) of dense young jack pine for its breeding habitat. This habitat was historically created by wildfire, but today is primarily created through the harvest of mature jack pine, and planting of jack pine seedlings.
Since the mid-19th century at least it has become a restricted-range endemic species. Almost the entire population spends the spring and summer in Southern Ontario or the northeastern Lower Peninsula of Michigan and winters in The Bahamas.
These birds have bluish-brown upper body parts with dark streaks on the back and yellow underparts with streaked flanks. They have thin wing bars, dark legs and a broken white eye ring. Females and juveniles are browner on the back. Like the palm warbler and prairie warbler, they frequently bob their tails. At 14–15 cm (5.5–5.9 in) and 12–16 g (0.42–0.56 oz), it is the largest of the numerous Setophaga warblers. Their song is a loud chip-chip-chip-too-too-weet-weet often sung from the top of a snag (dead tree) or northern pin oak (Quercus ellipsoidalis) clump.
Their breeding range is in a very limited area in the north of the Lower Peninsula of Michigan. In recent years, breeding pairs have been found in the Upper Peninsula of Michigan, Wisconsin, and southern Ontario likely due to the rapidly expanding population. Breeding habitat is typically large areas (> 160 acres) of dense young jack pine (Pinus banksiana). Kirtland's warblers occur in greatest numbers in large areas that have been clearcut or where a large wildfire has occurred. The birds leave their breeding habitat between August and October and migrate to The Bahamas and nearby Turks and Caicos Islands; they return to Michigan to breed again in May. In their winter habitat, they have been found primarily in scrub habitat, feeding on wild sage, black torch, and snowberry.
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