warblers

Pine Warbler

Pine Warblers (Setophaga pinus) are common in eastern pine forests. These long-tailed warblers are hefty with a stout bill. They are small, measuring about 5.1-5.5 inches with a wingspan of 7.5-9.1 inches, and they weigh about 0.3-0.5 oz. The Pine Warbler is yellowish with an olive back, a whiteish belly, and two prominent white wing bars on gray wings. Adult males are brighter than females; females and immatures are more subdued in color and can even appear gray-brown. Pine Warble can be difficult to see as they perch high in pines. Compared to other warblers, this species is not heavily patterned.
Pine Warblers are well-named as they spend most of their time in pine trees. Pine Warblers live in pine or mixed pine-deciduous forests in the eastern United States. Northern populations migrate to the southeastern United States during winter. Individuals that breed in the southeast typically stay there year-round.
Insects make up most of their diet, which mainly consists of caterpillars and other arthropods, including beetles, grasshoppers, bugs, ants, bees, flies, cockroach eggs, and spiders. However, in colder months, they will eat fruits and seeds, notably pine seeds. While foraging, they will hop along branches as they pick food from bark and needles. Pine Warblers can also feed on the ground and catch insects in the air.
Males are aggressive in the early breeding season; they chase other birds and indicate aggression by gliding or flying with stiff wingbeats around their opponent. Sometimes during a fight, they fly toward each other and lock bills in the air. In winter Pine Warblers will forage in mixed-species flocks. In late winter or spring, males will establish breeding territories by singing persistently and chasing intruders.
Nests are almost always built in pine trees, usually high in the tree and concealed among needles and cones. The female will gather most of the nest material and bind the nest with sider or caterpillar silk. The female can begin laying eggs in 14 days once the nest is finished. The male will often escort the female as she gathers nest materials and occasionally will help build. There are 3-5 eggs in a clutch, with only 1-2 young hatching. The incubation period is 10-13 days, and it takes about 10 days before the offspring can leave the nest. Eggs are white, grayish, or greenish-white with brown speckles. The offspring are undeveloped and downy. Parents will perform the broken wing display to lure predators away from the nests. After the young fledge, the warblers will move around in family groups.
Pine Warbler populations are steadily increasing, indicating this species is a low conservation concern. Across much of their range, the pine forests have been altered or destroyed by logging, development, and fire suppression. However, over the last few decades, Pine Warblers have moved into deciduous forests where pines have been introduced.
Photo Credit: Lynn Marie, Andy Waldo
Author: Destiny Alvarez – Fisheries and Wildlife Sciences, University of Oregon
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Yellow-throated Warbler

The Yellow Throated Warbler (Setophaga dominica) is well named for its bright yellow throat; they are gray and white with black streaks down the sides. They are small birds measuring about 5.1-5.5 inches with a wingspan of 8.3 inches and weighing about 0.3-0.4 oz. Their range consists of the central and eastern parts of the United States, parts of Mexico, and the Caribbean islands. Florida is part of their non-breeding habitat. Their habitats are the same during the breeding season and winter range; they live in pine forests with an open understory, bald cypress swamps, and woodlands near streams.
The warbler’s diet consists of insects such as beetles, caterpillars, and flies. They forage more deliberately and with less fluttering than other warblers as they will probe for insects in crevices, pine cones, and clusters of pine needles. During the non-breeding season, they also forage on insects attracted to agave and coconut palm flowers. During the breeding season, males will establish territories with song and generally will only interact with their mates and offspring. During the non-breeding season, they form mixed-species flocks with Carolina Chickadees, Tufted Titmice, and other warblers.
According to the North American Breeding Bird Survey, the Yellow Throated Warblers are common and are a species that is of low conservation concern.
Photo Credit: Andy Waldo
Author: Destiny Alvarez – Fisheries and Wildlife Sciences, University of Oregon
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Black-and-white Warbler

Black-and-white Warblers, Mniotilta varia, spend their winters in Florida and California, with some migrating all the way to northern South America. These medium-sized warblers can be found in a number of habitats including forests, wetlands, mangroves, and urban settings.
Insects and butterfly larvae make up their diets. Look for these agile birds on tree trunks and thick limbs where they use their downcurved bills to probe moss and bark to pluck insects.
Photo Credit: Lynn Marie
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Prothonotary Warbler

Prothonotary Warbler
The radiant golden Prothonotary Warbler, Protonotaria citrea, is a delight to see as it hops among the low branches in the dark understories of shaded swamps. It has bluish-gray wings and tail, white under the tail, olive-yellow back, and black beady eyes. Females are a bit paler than males.
Prothonotary Warblers, also known as swamp warblers, breed in swamps, flooded forests, and woods near lakes and streams. They are one of only two warblers who build their nests in abandoned chickadee and woodpecker holes. Courtship begins in April when the males arrive in Florida. After quite a display of courtship, the male will place moss in the nesting cavity. The female will build the nest of leaves, bark, and moss before incubating 3 – 7 eggs for 12 -14 days. Both parents feed the young for 9- 10 days when they are ready to leave the nest. Prothonotary Warblers produce 1 – 3 broods each year.
Aquatic insects make up most of the warblers’ diet. Prothonotary Warblers forage on shores and above standing or slow-moving water. They also dine on spiders and insects including butterflies, beetles, flies, caterpillars, grasshoppers, ants, as well as seeds and fruit.
Migration begins in early fall to their winter homes in Central or northern South America.
Prothonotary Warblers are a species of concern. Their population is declining due to the loss and alteration of forested wetlands. Snakes and raccoons are nest predators. Restoring forested wetlands where natural flooding occurs has proven successful in increasing populations. Nest boxes with predator guards protect the eggs from predators.
Connect. Respect. Coexist.
Photo Credit: Paul Waller
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