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There are three other very similar species from the same genus in Brazil. The females and imature individuals are nearly impossible to tell apart, as they are light brown with some darker streaks. The Saffron Finch can be distinguished from the other species for the saffron color, mostly in the breeding season. The Orange-fronted Yellow Finch ( S. columbiana) is smaller than the Saffron Finch, the Stripe-tailed Yellow Finch (S. citrina) has greenish patches on the upper parts and the Grassland Yellow Finch (S. luteola) has brownish spots even in the head. One of the countryside’s most famous birds, the Saffron Finch’s song is unique for its beaty and complexity. Unfortunately its song and...

13,5cm The most distinguishing features of this species are the yellowish-orange head and the grayish-green body. This shades of color may vary depending on the subspecies, given that this bird is distributed thoughout the tropical region South to the Amazon river and East to the Andes. There is also a curiously isolated population in the Orinoco river basin. It lives in secondary forest, forest edges and even in cities with plenty of trees. Spends most of its time in the canopy, rarely coming to the ground. This bird moves in a very typical way, climbing the branches in a fast zig-zag, up to the tip and then letting itself fall onto the base of the next branch. It feeds mainly on s...

Ordem dos canais fluviais segundo Strahler

Uma maneira ludica de demosntrar o barbeiro (Triatominae) e as possiveis formas de transmissão da doença de Chagas, pela injeçao do inseto triturado em caldo de cana e açái.

Meios em que a Doença ocorre e anatomia do besouro barbeiro transmissor da Doença de Chagas

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 ...

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...

19 cm. The body is brown, darker in the back and ferruginous in the tail. The ventral part is light brown. Distribution: Northeast, Mideast to South of Brazil, also in Argentina, Paraguay, Uruguay and Bolivia. Has been spreading its distribution along with deforestation. Habitat: Open landscapes, fields, cerrado, lawns and gardens. Diet: Mainly arthropods, sometimes seeds. Reproduction: The couple builds the nest with mud, manure and straw that they carry with their beaks and model with their feet. The nest is usually built on tall trees. Each year a new nest is built, sometimes over the previous ones (up to 11 nests one above the other). The nest has two divisions and the eggs...

25 cm. The supercilium is white. The plumage usually shows traces of earth. The male is slightly larger than the female and the belly is lighter. Distribution: From Canada to Tierra del Fuego. Habitat: Open fields, grasslands and suburbs, sometimes in soccer fields. Diet: Feeds mainly on beetles, but also other arthropods. Also consumes small vertebrates. Reproduction: The nest is a deep hole in the ground (1,5 to 3m of depth). Although it is able of digging its own hole it generally uses the ones dug by other animals as the armadillos. The couple lines the nest with grass and dry manure. The female lays up to four eggs. The female incubates and the male takes care of the brood. ...

Membrane Attack Complex formation through interaction of its complement system constitutive parts. The complex is typically formed on the surface of intruding pathogenic bacteria through activation of the complement system, when C5 convertase cleaves a C5 molecule into C5a and C5b. It is composed of four complement proteins (C5b, C6, C7 and C8), which bind to the outer membrane surface, and of a fifth protein, C9, polymerizing into a ring-like structure, put across the membrane and allowing free diffusion through it. This disrupts the osmotic environment of the cell and kills it promptly.

Nome popular: -.

Árvore até 10m; extremidade dos ramos cilíndrica, em zig-zag, glabrescente, lisa, marrom-avermelhada no material seco; folha simples, alterna, dística, sem estípula, pecíolo canaliculado, 0,5 X 0,2cm, tomentoso a glabrescente, lâmina elíptica, ou oblonga a oblongo-obovada, ápice acuminado, ou longo-acuminado, base cuneada, 11,5-26 X 4-6cm, margem inteira, algo revoluta, cartácea, venação camptódroma, 13-17 pares de nervuras secundárias, mais conspícua na face abaxial, venação terciária formando retículo, pouco conspícuo, face adaxial glabra, abaxial tomentulosa, com tricomas mais concentrados na nervura principal. pontuações co...

Nome popular: araticum.

Árvore até 15m; extremidade dos ramos em zig-zag, lanoso-ferrugínea; folha simples, alterna, dística, sem estípula, pecíolo algo canaliculado, 1 X 0,1cm, lanoso-ferrugíneo, lâmina oblonga, elíptica ou oblongo-elíptica, ápice freqüentemente acuminado, base cuneada, 12,5-26 X 4-9cm, margem inteira, ciliada, cartácea, venação camptódroma, 13-25 pares de nervuras secundárias, paralelas, espasada ca. 1cm, mais conpícuas na face abaxial, venação terciária, paralela, perpendicular à secundária, algo conspícua, face adaxial com tricomas esparsos, abaxial lanoso-ferrugínea, tricomas adensados nas nervuras, macia ao toque; botõ...