Breeding begins as soon as birds arrive. May Baltimore orioles reach the northern states and provinces. May is the peak month for nest-building. Bullock's orioles finish their migration up the coast, and most reach their interior mountain and plains breeding grounds.
Nesting peaks in May and early June. June This is the month most baby Baltimore orioles hatch. Parents are busy incubating eggs and raising babies. Bullock's orioles are busy with eggs and babies. Baby-rearing peaks this month. July As Baltimore oriole babies become independent, parents begin molting their body and flight feathers, and some are already starting to migrate at the beginning of the month!
Bullock's orioles are still busy with babies in parts of their range, and also starting to molt their body feathers. Ornithologists are still collecting data about the molt of their flight feathers. They leave the drier areas of Washington and California by the end of the month. His wings have 2 white wing bars. The females is olive above, yellowish below with 2 white wing bars. This particular Oriole bird is found east of the Rockies. Its western counterpart; the Bullock's Oriole, is similar in appearance.
Orioles at Feeder - Check This Feeder Out Here While the major league team adopted this birds name and colors, the bird itself, got its name from George Calvert, Lord Baltimore, a 17th-century nobleman whose coat of arms used the same colors. Because the two birds interbreed in the Central Plains and have similar types of habits, the American Ornithologists Union renamed both birds and called them The Northern Oriole.
The mating season begins in late April to early May. The males arrive 2 or 3 days before the females and begin claiming their territories. Singing from treetops in their effort to attract a mate. Their singing is almost constant until they mate with a female. Unlike the Northern Mockingbird though, these birds do not sing at night. Generally, any singing late in the season is from unmated or immature birds.
Once the birds have found a mate they defend their territory and begin nesting. Once the female selects a male a nest site is chosen that is within the males territory. Building a hanging nest made from plant fibers and suspended from a branch 6 to 90 feet above ground. While it's quite common for them to return each year to the same territory, it's rare that they will use the same nest itself.
They often take parts of old nest to build a new one, so you may see them at the old nest site. Bird watchers will find the best viewing of the Baltimore Orioles nest when the leaves are off the trees. You'll see them at the end of branches high in shade trees.
Most fall migration occurs from late August to early October. Oberholser also lists a few winter records. The breeding season for this species is relatively short and the periods of north and southbound migration nearly overlap. Sorting out breeders from late spring or early fall migrants requires diligent work by observers. Baltimore Oriole is an adaptable species, breeding in open deciduous woodlands, including riparian situations, residential areas and parks. In Texas, it prefers cooler, moister habitats.
The nest is placed 1. The nest is usually placed near the end of a horizontal or nearly horizontal branch, often with the rim attached to a forked twig. The female weaves tough grasses, strips of bark, and other materials, including human detritus. She takes as long as 2 weeks to complete the task.
The nest is lined with plant down and other soft materials and is built strongly enough that some last through two winters.
The usual clutch is 4 or 5 eggs, with a range of Oberholser The female incubates for 11 days and the young remain in the nest about 2 weeks Rising and Flood The breeding status of Baltimore Oriole in Texas is not encouraging. Lockwood and Freeman report this species as a common migrant in the eastern half of the state, but as a locally uncommon summer resident of the eastern third of the Panhandle and rare to uncommon and local in north-central Texas.
The TBBA map suggests the breeding range of this species is quite limited geographically. BBS data show observers found an average of one oriole or less per 40 km 25 mi route in Texas with a slightly higher density in the extreme northeast corner of the Panhandle Sauer et al. In contrast, several routes in Kansas and Nebraska, averaged Baltimore Orioles per route Price et al.
The range of Baltimore Oriole in Texas may not have changed greatly since Edgar Kincaid in Oberholser , p. He suggested this decline may have been due to a trend to warmer and drier weather in the state.
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