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  • Category: Image
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Ilustração de um corte anatômico da folha de Avicennia sp.

Essa imagem foi idealizada para compor um livro ou uma apresentação de slides (ou mesmo diversos tipos e formatos de divulgação de conhecimentos, como cartilhas e posts) referentes à plantas da região do mangue brasileiro, dentro da área Biologia e da subárea Botânica. A imagem é um esquema, feito de forma levemente abstrata, que mostra todas as estruturas internas das folhas de Avicennia sp., planta abundante no manguebrasileiro, e que estão presentes na maioria das plantas dessas regiões. As estruturas estão desenhadas e descritas em cores diferentes entre si para permitir uma identificação mais precisa e tornar mais fácil sua visualização nos cortes anatômicos reais. A partir da exposição...

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  • Category: Thesis or Monograph
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FUNGOS CONIDIAIS ASSOCIADOS A FOLHAS EM DECOMPOSIÇÃO DE Clusia melchiori Gleason e C. nemorosa G. Mey EM FRAGMENTO DE MATA ATLÂNTICA, BAHIA, BRASIL

Os fungos conidiais constituem um grupo diversificado, com cerca de 15.945 espécies. Contudo, pesquisas taxonômicas sobre esses fungos no Brasil permanecem escassas e pontuais abordando, sobretudo, os decompositores de substratos vegetais. A Serra da Jibóia, fragmento de Mata Atlântica inserido na Caatinga do Estado da Bahia, foi selecionada como prioritária para conservação da biodiversidade. Visando contribuir para o conhecimento dos fungos conidiais na área, folhas em decomposição de três indivíduos de Clusia nemorosa, e C. melchiori foram coletadas bimestralmente de outubro/2005 a junho/2006. No laboratório, as folhas foram lavadas, colocadas em câmara-úmida e os fungos identific...

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  • Category: Handout or Class Script
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  • Downloads: 166
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OBSERVAÇÃO DE ESTÔMATOS EM FOLHAS DE TRAPOERABA-ROXA OU DINHEIRO EM PENCA

estômatos das duas plantas podem ser facilmente visualizados em lupa comum, sem qualquer corte ou preparação das folhas. Os estômatos são poros por onde ocorrem as trocas gasosas (entrada de gás carbônico e saída de oxigênio), na fotossíntese e saída de vapor de água, na transpiração.

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  • Category: Image
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  • Downloads: 576
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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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  • Category: Image
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  • Downloads: 525
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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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  • Category: Image
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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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  • Category: Image
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  • Downloads: 558
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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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  • Category: Image
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  • Downloads: 539
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Black Bellied Whistling Duck (Dendrocygna autumnalis)

48 cm. The face is grey, the chest cinnamon and the belly black. There is a large white spot in the wings, more evident when flying. The beak and feet are red. Males and females are similar. The immature is grayish brown Distribution: From Texas (U.S.A) to Bolivia and Argentina. Habitat: Lives in lakes, rivers, wetlands and even in mangroves. Diet: Feeds on leaves, small seeds and aquatic invertebrates. Reproduction: The nest is built on the ground or hollow trees. The eggs are white, sometimes greenish or bluish. More than one female may lay eggs in the same nest and sometimes may even lay eggs in other species’s nests such as the white faced whistling duck (Dendrocygna viduata)....

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  • Category: Image
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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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  • Category: Image
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  • Downloads: 511
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Short-crested Flycatcher ( Myiarchus ferox )

18,5cm Like other flycatcher from the same genus, the Short-crested Flycatcher is yellow bellow, has a grayish throat and mostly brown upperparts. It can be told apart from the other species by the short crest and the absence of white spots around the eyes. Like other species of flycatcher it spends most of the time perched in forest edges. Feeds mainly on flying insects that it seizes in short flights, returning to the same perch. It also catches insects among the leaves and berries. Its vocalization reminds that of the White Woodpecker ( Melanerpes candidus ). The nest is build lining a small tree hole, where two buffy eggs are laid.

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  • Category: Image
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  • Downloads: 569
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Sayaca Tanager

18,5 cm. The body is gray, slightly blue with the inferior parts lighter. The tail and the tips of the wings are blue, somewhat green. There is a spot of this color in the shoulders. Male and female are similar. Distribution: Mideast Brazil from Maranhão to Rio Grande do Sul, also in Venezuela, Colombia, Bolivia, Argentina, Paraguay and Uruguay. Habitat: Lives on trees, either in open areas, parks or cities. Diet: Feeds on fruits, leaves, buds, nectar including from eucalyptus trees. Also catches flying insects as butterflies and termites. Reproduction: During the breeding season the male exhibits its shoulders to the female. The nest is built by the couple and is a compact open b...

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  • Category: Image
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  • Downloads: 502
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Squirrel Cuckoo ( Piaya cayana )

60 cm. The tail is very long. The general color is reddish brown. The tail feathers are pale in their tips and in the inferior side. The head has a lighter coloration. The chest is gray. The young individuals have shorter tails. Distribution: From Mexico to Argentina. Habitat: Lives in the canopy of secondary forests, cerrado and urban areas with plenty of trees. Diet: Feeds on grasshoppers, bugs, caterpillars, spiders, etc. Also feeds on small vertebrates as treefrogs. Reproduction: In the breeding season the male sings restlessly 96 times a minute. Before mating gives the female a caterpillar. The nest looks like a frying pan made of loosely crossed branches and is placed in a tall...

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Neotropic Cormorant ( Phalacrocorax ( brasilianus ) olivaceus )

75 cm. Aquatic with narrow beak curved in the tip. The feet are webbed. The body is black and sometimes the throat is yellow. In the breeding season the male has some white feathers in the throat and ear region. The immature is fuliginous. Distribution: From Mexico to Southern South America Habitat: Lives in lakes, swamps and estuaries. Diet: Feeds on fish, even spiny ones. The gastric acids dissolve the spines. Reproduction: The nest is built on tall trees near lakes, sometimes mixing with heron flocks. Natural history: It is an excellent diver. When in flocks may pen fish schools, leading them to shallow water where they catch the fishes in frenzy. When it goes out of the wate...

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  • Category: Image
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  • Downloads: 520
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Great Kiskadee ( Pitangus sulphuratus )

22 cm. The beak is strong and black. The chest and the belly are bright yellow and the back is brown. The throat is white and the head black, with a white band above the eyes. Male and female are similar. Distribution: From Texas (U.S.A) to Patagonia. Habitat: It is one of the most generalist birds. Thrives in environments as different as rocky beaches and semi-arid landscapes. It is very common in cities. Does not penetrate dense vegetation, but may be found in forests near the riverbanks or in the borders. Diet: Also very generalist in the diet, consumes mainly insects, but also fruits, learns to catch small fish and tadpoles (as from the author’s tanks), hunts hatchlings and e...

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  • Category: Image
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  • Downloads: 506
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Roadside Hawk ( Rupornis magnirostris )

36 cm. The legs and the beak are yellow. The tail is short and the wings are broad, with a somewhat rectangular shape when flying. The chest is light brown streaked in different colors and the upper parts are in shades of gray. The immature is brown and striated. The female is slightly larger than the male. Distribution: From Mexico to Argentina. Habitat: Inhabits cerrado, gallery and secondary forests, fields, farms and cities. Diet: Big insects, amphibians, small lizards , mammals and birds. Sometimes hunts perched bats. May follow groups of coatis or monkeys, catching animals displaced by their movements. Reproduction: The nest is a platform built on the top of tall trees....

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  • Category: Image
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  • Downloads: 501
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Rough-winged Swallow ( Stelgidopteryx ruficollis )

14 cm. The legs, beak and the neck are short. The throat is red, contrasting with the fuliginous sides of the head, the back and the chest that is lighter. The belly is pale yellow. The last feather of the male’s wing is rough. Distribution: From Panama to Argentina. Migrates in the south. Habitat: Open landscapes and cities, generally near the water. Diet: Feeds on insects it catches when flying. Reproduction: Builds a nest digging holes in slopes, sometimes in colonies. Lays three to six white eggs. The couple sleeps together in the nest, but only the female incubates. The couple takes turns to feed the brood. When the offspring leave the nest they remain nearby for some ...

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Suiriri Flycatcher ( Suiriri suiriri )

There is still some debate on this bird’s taxonomic status. The Brazilian Official Bird List considers two species, the Suiriri Flycatcher, with two subspecies, the Chaco Suiriri, and the Campo one, which differs from the previous for having a yellowish rump, instead of grayish, and there is the recently described Chapada Suiriri ( Suiriri islerorum ), similar to the Campo one (possibly hybridizing with it) but with a smaller beak and white in the tip of the tail. Very little is known about this species. It is mostly solitary and uses the same hunting techniques of most other flycatchers, that consist basically of catching flying insects few meters away from its perching site and returni...

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  • Downloads: 464
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Variable Antshrike ( Thamnophilus caerulescens )

15 cm. The male is dark grey with the top of the head black. There are white spots in the tip of the tail’s feathers and in the wings, in a pattern that is similar to other antshrikes. The female is brown. Distribution: From Peru and Bolivia to Uruguay. Absent in most of the Amazon. Habitat: Mostly in Forest borders, gallery and secondary forests. Diet: Arthropods. Beats the wings to shake the foliage, catching the insects that are scared. Reproduction: The male offers the female some food before mating. The couple builds a nest with stems and moss. The female lays three white eggs with red dots. Generally the male incubates during the day and the female in the night. The paren...

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Results 1 - 20 from 225 Found materials (New search)