Red-crowned Amazon
Amazona viridigenalis
Fairly large, bright green parrot endemic to humid tropical lowlands and foothills in northeast Mexico. Uncommon. Found in forests, edges, semiopen areas with scattered tall trees, and forest patches. Most often seen flying over early and late in the day, often fairly high and usually in pairs or loose groups made up of pairs. Best field mark is the pale, ivory-yellow bill that contrasts with the red forecrown. Like other similar parrots, in flight shows a red patch on the back of the wing. Introduced to California, Puerto Rico, Florida, and Hawaii.
识别特征
Their appearance is generally green with the most notable features being a bright red forehead and crown, dark blue streak behind the eyes, and light green cheeks. It is not uncommon for red-crowned amazons to have splashes of red and blue under their wings and have light yellow-tipped tails. They have a white eye-ring which brings out their eyes. Their iris color can range from a bright yellow to a deep red, although juveniles' eyes are gray until maturity. Red-crowned amazons usually have horn colored beaks and ceres but these can sometimes have black highlights. Their legs are beige or gray. They are approximately 11–13 inches (28–33 cm) in length from the beak to the tip of the tail feathers with a wingspan of 15–16 inches (38–41 cm). Most Amazon parrots are not sexually dimorphic (the exceptions being the White-fronted Amazona albifrons, Yellow-lored Amazona xantholora, and Blue-fronted Amazona aestiva) so the only true way to identify gender is by genetic testing. Their average weight is 270 grams (9.5 oz).
分类信息
- 学名
- Amazona viridigenalis
- 命名信息
- (Cassin, 1853)
- 目
- Psittaciformes
- 科
- Psittacidae
- 属
- Amazona
分布与栖息地
Their natural range is across the lowlands of northeastern Mexico, and possibly the southern tip of Texas. Red-crowned amazons are a resident (non-migratory) species in their native range, but they can wander outside of their breeding range to follow a food source. Feral birds have bred in urban communities of southern California, southern Florida and the island of Oahu in Hawaii.<p>On June 4, 2019, the Corpus Christi Ecological Services Field Office of the US Fish & Wildlife Service announced to the public that the USFWS considers the red-crowned parrot native to Texas in the Rio Grande Valley. However, because parrots were not mentioned in the Migratory Bird Treaty Act of 1918, birds in the Texas portion of their range are not entitled to USFWS protection, and must rely on enacted state and local laws. The USFWS estimated that there are roughly 700 wild red-crowned parrots in the Rio Grande Valley of Texas in 2019, and historical records place parrots in South Texas as early as 1885. The numbers of wild parrots in the United States now rivals populations in Mexico, due to their adaptation to urban life. However, the IUCN and other resources consider the bird to be non-native to all parts of the United States, including southern Texas. NatureServe considers the species to be "Imperiled" in Texas.<p>Populations of feral parrots exist in cities such as the Los Angeles metropolitan area in California, US, especially the San Gabriel Valley. Populations also exist in the San Diego area. Captured birds there escaped and became part of the urban ecosystem, starting in about the 1960s. The California Parrot Project says that red-crowned amazons are among the thirteen species of parrots with naturalized populations in California, including six in the genus Amazona. Los Angeles has been called a sanctuary for this endangered species, with a population of around 3,000 that is estimated to meet or exceed the remaining wild population in Mexico. Area residents say that although the birds annoy with their loud calls, they also inspire local pride and identity.
- 迁徙
- Nomadic movement
行为
They gather in large flocks being noisiest in the morning and evening. The characteristic screeching heard of these birds usually occurs when they travel in a large flock to a new feeding area. Their diet consists of seeds, fruits, flowers and nectar. Red-crowned amazons nest in tree cavities, like most other parrots. Amazons are one of the easiest parrots to read the behavior of, as their eye color shows their pinning exceptionally well. Red-crowned amazons pin their eyes when they are excited, either positively or negatively, about something in their environment. It is easy to make out the dilations of the pupil against the bright iris. This pinning, combined with different behavioral signs, can let a fellow parrot or an owner know how the parrot is feeling. An angry parrot may fan its tail feathers while a content, affectionate parrot may purr, or bend their head down to be scratched.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Madagascar Scops-Owl
Otus rutilus
Typical scops-owl, with small ear tufts that can be hidden, especially when roosting during the day. Color varies from gray to brown to rufous, with rufous birds more prevalent in the eastern rainforest. Inhabits both moist and dry habitats throughout Madagascar, including rainforest, dry deciduous forest, spiny forest, scrub, and plantations. Often found on day roosts in low tangles. Song varies geographically. In the east, it is a punctuated “tru-tru-tru…”. In the west it is a more rolling “trrr-trrr-trrr…”. Intermediate vocalizations can be heard in transitional zones, such as far northern Madagascar. Much smaller than all of Madagascar’s other owls.
Parasitic Weaver
Anomalospiza imberbis
Odd little short-tailed and chunky-billed member of the indigobird family. The male is yellow, with dark wings and tail, while the female is brown and streaky on the back and buff on the face and underparts. Found in moist grassland and open savanna. Uncommon across its range. Indistinct song consists of short, rasping phrases. Male could be confused with canaries but has an all-black bill. Female resembles female bishops but has a shorter and thicker all-black bill.
Red-legged Honeycreeper
Cyanerpes cyaneus
Small, warbler-like tanager of tropical lowlands. Favors forest edge, woodland, and semi-open areas with taller trees. Often occurs in small groups, sometimes larger flocks, usually in the canopy of flowering trees, where it probes for nectar with its long bill. Red legs are bright on male, dullest on young birds. Male is blue in breeding plumage, with a turquoise cap; female and non-breeding male are greenish overall with faint streaking on the chest. In flight, the underside of the wings flash bright sulphur-yellow.
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