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Embriologia

Este software aborda os conteúdos básicos da embriologia, trazendo ilustrações, animações e textos que ajudam no entendimento do conteúdo. As informações estão organizadas em tópicos e links, de modo que o usuário possa navegar livremente pelo assunto que desejar, sem ter que obedecer uma seqüência rígida.

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Sapphire-spangled Emerald (Amazilia lactea)

Length: 9,5cm Identification: the back is bright green, the tail and part of the wings are dark blue. The throat and the chest is sapphire-blue. The belly is white and there is a white line splitting the chest. The two sexes look alike. It is one of the main pollinators of several plant species, including some introduced ones. It is territorialist and visit the flowering patches at predictable times. It explores even the lowest flowers. This hummingbird usually explores feeders where it fights against the bananaquits ( Coereba flaveola ) and the swallow-tailed hummingbird ( Eupetomena macroura ). The bow-shaped nest usually shelters two eggs.

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Chestnut-capped Blackbird ( Chrysomus (Agelaius) ruficapillus )

Physical appearance: 17,5 cm. The male is bluish black with the forehead and chest chestnut. The female is olive brown streaked in brown in the upper parts. The immature is brown and striated. Distribution: Eastern South America from French Guyana to northern Argentina and as far west as Mato Grosso and eastern Bolivia. Habitat: Lives in humid grasslands, wetlands and ponds. Diet: Feeds mainly on insects and seeds, but also on fruits. Reproduction: Often nests in groups. The nest is built in a fork of a tree. Both male and female build the nest watering the material before using it. The nest is a deep basket. Natural history: The vocalization is melodic and commonly the predomi...

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Grassland Sparrow ( Ammodramus humeralis )

Physical appearence: 12cm. The upper parts are grayish with black and ferruginous stripes The chest is light brown with spots in the immature. There are yellow ribbons above the eyes and in the wings. The coloration may change when it is dirty due to contact with earth. Distribution: The Grassland Sparrow is found east of the Andes from Colombia to central Argentina but is missing from the Amazon Basin upstream from the Tapajós river. Habitat: Dry fields with grass, cerrado and crops. Diet: Feeds on grains and small insects. Reproduction: During the breeding season they live in pairs in a territory defended by the male. The nest is opened and placed on the ground. The eggs are s...

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Little Nightjar ( Caprimulgus parvulus )

Length: 20cm Identification: nightjars are always very difficult to identify as they are nocturnal birds, rarely seen during the day due to their camouflage. On the other hand there are few species inhabitting urban areas and among these the little nightjar is usually the smallest and with the lightest color pattern. Distribution: it is distributed through all the South American countries east to the Andes. Habitat: occurs in a wide range of ecosystems, but is specially common in forest edges surrounded by crops and wetlands. This nightjar spends the whole day quiet and very well camouflaged on the ground and thus is rarely seen at daylight. It only flies during the day ...

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Bananaquit ( Coereba flaveola )

Physical appearance: 11 cm. The upper parts are dark and the inferior parts yellow. There is a white bar in the supercilium. The females are smaller than the males. The immature individuals have grey belly and do not have the bar above the eye. Distribution: From Mexico to Chile. Habitat: Inhabits various environments provided there is plenty of trees and flowers. Diet: Feeds mainly on nectar. Also eats insects. Visits hummingbird feeders. Reproduction: Builds two kinds of nest. A breeding one that is compact with thick walls and a resting nest made of leaves, grass and spider webs. Lays two or three white eggs. Only the female incubates. The male helps feeding the brood with i...

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Green-barred Woodpecker ( Colaptes melanochloros )

Physical appearance: 26 cm. The upper parts are green, somewhat yellow, barred in black. The inferior parts are buffy or white, also barred. The tail and the top of the head are black. The male has a red spot below the eye while in the female this spot is black. Distribution: From Eastern Amazon to Uruguay and Argentina. Habitat: Forest borders, gallery and secondary forests, woods and parks in cities. Diet: Feeds on ants and insect larva, mainly beetles. Also eats fruits. Reproduction: After courtship the couple builds a nest inside an old tree, sometimes palm trees and others. The nest is generally downwards, avoiding the water when it rains. Two to four eggs are laid and the ...

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Ruddy Ground Dove ( Columbina talpacoti )

18,5 cm. The body is brown, darker in the upper parts, wings and tail. The tip of the wings are cinnamon. The male’s head is light grey. The immature has buffy spots in the wings. Distribution: Throughout Brazil. From Mexico to Bolivia, Paraguay and Argentina. Habitat: Lives in any open landscape. Adapts to life in big cities. Diet: Feeds on grains and fruits. Swallows the whole seeds, thus it may be poisoned by seeds with pesticides. Searchs for food on the ground. Reproduction: Breeds throughout the year, and may have three or four broods. When mating the male raises one of the wings. They caress each other in the head and give food as gifts. It is a monogamous species. The n...

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Red-Crested Finch ( Coryphospingus cucullatus )

13,5 cm. The male’s top of the head is black with a scarlet topknot. The body is red, with the upper parts brownish red. The female does not have a topknot and the upper parts are brown. Distribution: From the Guyanas to Argentina. Habitat: Secondary forests, cerrado and farms. Diet: Feeds on seeds and insects. Reproduction: When breeding lives in pairs and the male protects the territory. Builds a cup-like nest with leaves, lichens and spider webs. Lays 3 to 5 bluish or white eggs. Both male and female feed the offspring. Natural history: The male’s topknot can only be seen when it is excited. When not breeding lives in groups, sometimes mixing with other species. In dry ...

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Smooth Billed Ani ( Crotophaga ani )

33 cm. The tail is very long. It is all black. The bill is thick and strong. The skin is also black. Male and female are similar. Distribution: From Florida (U.S.A) to Argentina. Habitat: Inhabits open landscapes with grass. Prefers moist places. Diet: Consumes arthropods, mainly grasshoppers, and small vertebrates as lizards, mice and frogs. Also eats hatchlings. Fishes in shallow water. In some seasons, mostly in the dry ones when arthropods are scarce it eats fruits and seeds. Follows cattle and tractors in order to catch insects displaced by their movements. Reproduction: The male dances around the female on the ground. It offers food as a gift for the female but sometimes sw...

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Curl-crested Jay ( Cyanocorax cristatellus )

35cm Similarly to other Brazilian jays, the Curl-crested jay has white lower parts and blue and black upper parts. It may be confused with the Plush-crested jay (Cyanocorax chrysops), but while the last presents the crest in the back of the head, the yellow iris and a blue patch around the eyes, the Curl-crested jay presents the crest on the forehead, the red iris and the head is entirely black. Whereas the Old World ravens are mostly black, as well as the crows, the Brazilan corvids are colorful and most of them have white lower parts. There are 6 species of jays in Brazil, all of them extremely beautiful. The Curl-crested jay is one of Brazilian’s noisiest jays. To make the noise ...

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Rufous-browed Peppershrike ( Cyclarhis gujanensis )

16 cm. The iris and a mask in the face are red. The top of the head and the wings are ferruginous. The sides of the head are gray and the belly brown. In some regions there may be yellow areas in the chest and throat Distribution: From Mexico to Argentina. Habitat: Forest borders, secondary and gallery forests, cerrado, caatinga, parks and gardens, usually in the canopy. Diet: Insects, their larvae and fruits Reproduction: The female builds most of the nest with grass. The nest is a deep open basket covered with moss and attached to the tree with spider webs. Male and female take turns to incubate the eggs and feed the offspring (2 or 3).

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Fulvous Tree-Duck ( Dendrocygna bicolor )

48cm Identification: the body is mostly cinnamon with dark streaks on the wings. It may be locally the commonest duck, especially in Southern Brazil wetlands, where its hunting is allowed provided the state’s quotas are respected. Regarding its habitat this species tends occur in open wetlands, surrounded by grasslands. Feeds mainly by grazing small grasses on the lake shores or underwater but also eats aquatic plants, aquatic insects and small fish. It may build the nest either in a tree hole or on the aquatic plants. The female lays from 8 to 14 eggs that are sat for about one month. The offspring start to fly within 55 days after hatching.

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White Faced Whistling Duck ( Dendrocygna viduata )

41,5 cm. Medium size. The feet are webbed. Has a distinctive white mask. The chest and the belly are streaked with cinnamon. The wings are broad and black. The female is slightly larger than the male. Distribution: Tropical South America and Africa. Habitat: Wetlands, lakes, ponds, mostly in shallow water. Diet: It eats buds, seeds, insect larvae, crustaceans and worms. Food is filtered by its specialized beak Reproduction: Builds a nest on the ground in a hidden place. 8 to 14 eggs are laid and incubated by the couple for 27 to 30 days. Male and female take care of the brood. Natural history: Its vocalization is very typical. It is more active at twilight or at night, resting ...

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Snowy Egret ( Egretta thula )

60cm Identification: there are four mostly white species of egrets in Brazil, the snowy egret can be told apart by its smaller size and also for having the tip of the beak black and for having dark legs with yellow feet. Laypeople usually think this species is a young great egret, however it is technically different enough to be place in another genus. It is bit more demanding than the great egret regarding its habitat necessities, as it does not occur in polluted waters and is more strongly associated to aquatic plants such as the water lily. Its reduced size allows this bird to walk over the aquatic plants without sinking. It feeds mainly on small fishes and tadpoles. The nest is ...

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Yellow-bellied Elaenia ( Elaenia flavogaster )

16cm Identification: the genus Elaenia is well known among the ornithologists for being one of the most difficult groups when it comes to species identification. Nevertheless Elaenia flavogaster is the easiest species to be identified, first for its yellow belly, second for the crest on the head (not always visible), third for the absence of white patches on the face and crest and last for its conspicuous behavior. It is more easily heard than seen and its song reminds the one of the kiskadee. It inhabits parks, backyards, coffee crops and secondary forest edges. The yellow bellied elaenia spends most of its time in the medium height trees and shrubs. Feeds mainly on insects and be...

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White-tailed Kite ( Elanus leucurus )

35cm Identification: when seen from below its body is basically white with the tip of the wings and a region around the eyes black. There is a gray area on the upper parts of the wings. Its color pattern reminds that of some seagulls. The name in Portuguese – Gavião Peneira – means hovering hawk and it is due to the behavior of hovering before diving onto the prey. It is certainly one of the most beautiful hawks found in urban areas. It flies over open areas, pastures, crops and even on the banks of polluted streams in search for rats. This kite feeds mainly on large insects such as grasshoppers and beetles and on small rodents and lizards. The nest, made of twigs, is built on iso...

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Variegated Flycatcher ( Empidonomus varius )

19 cm. The Variegated Flycatcher is one of 3 widespread flycatchers that are streaked below. The Variegated is larger than the Piratic Flycatcher (Legatus leucophaius), has a longer bill, more rufous on the tail and whiter edging to its wing feathers. On the other hand, it is smaller than the Streaked Flycatcher (Myiodynastes maculatus) with darker upperparts and less well defined streaking below. Distribution: Throughout South America, mainly in the south. Habitat: Lives in forest borders and open areas provided there are tall trees in which it can perch. Diet: Flying insects, insects in the foliage and sometimes small fruits. Reproduction: The couple takes care of each other’s...

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Fork-tailed Hummingbird ( Eupetonema macroura )

15cm Identification: it is one of the largest hummingbirds. It is easily identified by the forked tail, reminding a pair of scissors. Unmistakably Brazilian’s best known hummingbird, this magnificent animal is also one of the most belligerent ones. It fiercely defends its territory – usually consisting of a flowering patch – against other birds, especially the bananaquit ( Coereba flaveola ). It sucks sweet water from feeders even if these are place in the interior of the houses, fearlessly entering the rooms. Like other hummingbirds it feeds mostly on nectar but also on insects. The female lays 2 or 3 eggs in a small bow-shaped nest and feeds the nestlings mainly with arthropods.

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Aplomado Falcon ( Falco femoralis )

35cm Identification: the head is dark with a bege band on the eyebrows and another one on the neck. The throat is white, but unlike Falco rufigularis this ribbon is not extended up to the back of the neck. The chest is light brown with black dots, unlike Falco deiroleucus which presents this region orange. The belly is dark with white spots and there is a red patch near the tail. The tail is dark with three white bars. It is one of Brazilian commonest falcons since it inhabits open landscapes, included those disturbed by men. Feeds on small rodents and birds, reptiles and large insects. Like other falcons these are monogamous birds with fixed breeding grounds. The nest is built o...

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