Second, hagfish can be an example of the kind of eye that our eyes evolved from . Beyond what was said, even lamprey, during its growing, in the larva stage, present a retina with 2 layers, no iris or crystalline, no muscle supporting eye and the eye is under the skin . Then, during metamorphosis, retina develops a 3 layer , a crystalline and an iris are formed and eye comes to the surface. First it is important to note that hagfish is almost blind, and that despite it, its eyes didn’t disappear along the time. New branches refer to groups of species which today present different characterists and which are believed evolved in a different way somewhere in the past.
They have bright blue wings and plumes with the overall appearance of the bird, including the head and the nape, being glossy black. Female birds of this species do not have this carmine red plumage on their head. The forest is the favoured residence for the The Blue Bird-of-paradise. The elevational zone is under pressure from clearance for subsistence gardens by the increasing human population. The second major threat is hunting of adult males for their pectoral and tail feathers . Due to ongoing habitat loss, this bird has a decreasing limited range with a small population size.
The forums are dedicated to wild birds, birding, binoculars and equipment and all that goes with it. Please SHARE this video with all your bird-loving friends and family. If you want to see the beautiful Blue Bird of Paradise up close and live in action, watch this video. Extremely breathtaking and amazingly beautiful is what one can describe the Blue Bird of Paradise. It is a large bird that comes from the genus Paradisornis, but was previously known under the genus Paradisaea. The blue bird-of-paradise is a medium-sized bird-of-paradise.
During the breeding season, the male puts on a breathtaking display while hanging upside down from a branch pulsating the black oval with a rid margin on his chest, rhythmically enlarging and contracting its size. At the same time fanning out his violet-blue plumes, continuously making a soft, insect-like buzzing noise, mixed with chittering or chattering. If he is successful in his efforts the female goes on to build a nest from stems, twigs, palm leaves, and vines in a flat cup-like shape.
The nesting and parental duties are covered only by the females; she builds her nest with stems, twigs, palm leaves, vines and other materials all by herself, usually in a flat cup-like shape. They mostly lay one egg, but two are less occasional, and the mother is very defensive of her brood. The eggs are described to be a salmon-type color, with the ends being ringed with flecks of cinnamon-rufous to tawny. A beautiful large bird with amazing plumage of blue, red, white and black. A way for discovering the role of hormones would be check if there was some one in the birds when upside down that caused lowering of pression. But this birds are indangered and so maybe the study could be taken in other animals that are also under some conditions that favor higher intracranial pressions…
They typically feed alone, though females and juveniles are more likely to feed in trees in association with other birds or other species. They are shown to search high in the canopy when seeking fruits, and apparently forage at lower altitudes when in search of their animal prey. The male is also adorned with violet-blue and cinnamon-shaded flank plumes, from which emerge two long ribbon-like tail feathers. The display by hanging upside-down on a branch and spreading his feathers into a triangular shape, exposing a black oval patch surrounded by red on the breast. The oval looked like pulsating as it slowly fans its feathers and makes soft buzzing noise.
These birds are considered vulnerable according to the IUCN. Know more about the Blue Bird of Paradise and be amazed by it’s beautiful features like no other. Watch a short video of it below and see the bird up close and live in action. Regarded by some ornithologists as the loveliest of all birds, the blue bird-of-paradise was discovered by Carl Hunstein in 1884. The scientific name commemorates the ill-fated Crown Prince Rudolf of Austria.
They are also under threat from hunting for their highly prized plumes, thus blue birds-of-paradise are classed as Vulnerable on the IUCN Red List. The Blue Bird of Paradise, just like the other birds have differences in their looks depending on their sex. The male are more colorful with blue violet and sometimes cinnamon colored plumes with two ribbon like feathers. The females are a little bit duller in color, and are often chestnut brown. During the mating dance the bird hangs from a branch upside down. The black oval with red margin at the centre of his chest is rhythmically enlarged and contracted.
His violet blue plumes spread out in a fan, swaying its body back and forth while the central tail feathers form two impressive arches down to either side. Throughout his performance he vocalizes softly in a low but harsh vibrating voice. While the display behavior of the males of this species is quite well known, what may surprise a few people is that these birds are generally solitary. The male blue bird-of-paradise is almost always solitary and can sometimes be seen foraging with a few females and others birds-of-paradise species. The females, on the other hand, are solitary too but they are spotted in photos and videos with their young. Browse 213 blue bird of paradise stock photos and images available, or search for red bird of paradise or birds of paradise to find more great stock photos and pictures.
However, more recent studies have shown that the DNA evidence is enough to give this species their own genus, Paradisornis, which roughly translates to ‘paradise bird’ in Latin. Polygamy is the practice of breeding with multiple partners. When a male breeds with more than one female at the same time – it is called polygyny….
Blue Marlin
If the female bird is impressed with this display, the birds will mate. The male is polygamous and performs a breathtaking courtship display. But unlike most other birds of paradise species, he performs solitary on a preferably thin branch, while an attending female observes nearby. The black oval with red margin at the center of his chest is rhythmically enlarged and contracted. His violet blue plumes spread out in a fan, looking like an apron, swaying its body back and forth while the black wires form two impressive arches down to either side. During this display, he continuously makes a soft, insect-like buzzing noise, mixed with a chittering or chattering noise to rope the female back in if she moves away.
An even more interesting fact about this unique bird is that its feathers reflect the incident light in different directions and are able to generate several colors at the same time. Being omnivores, the blue bird-of-paradise is known to eat lizards, possibly skinks such as the blue-tongue skink and other animals, while also having a diet full of seeds and fruits. The litter size of this species is usually one, but in rare cases, it can go up to two.
The Blue Bird-of-paradise is best known for the striking beautiful colors of their feathers and the way the male performs an incredible courtship display. The Paradisaea rudolphi or the blue bird-of-paradise can live anywhere between five to eight years. This is quite similar to other sister species such as the red birds-of-paradise. The blue bird-of-paradise was formally described in 1886 by the German naturalists Otto Finsch and Adolf Bernhard Meyer.
Along with these is a very different bird of paradise species, one known as the Magnificent Bird . The Blue Bird-of-paradise occurs in lower montane forest, mainly at 1,400-1,800 m, but occasionally from 1,100 to 2,000 m , especially female-plumaged birds. Although displaying males usually use patches of primary forest, they have also been reported singing in the highly populous Tari valley, in areas with little remaining primary forest (B. Beehler in litt. 2012).
Blue Bird-of-paradise Paradisornis rudolphi
This is, what if vision was added to the previous function, rather than substitute them? Vision is the most visible function, but many organs have more than one function, some of then very subtile. Maybe they can, being stimulated with certain wavelengths, generate a lowering in blood pression. The birds-of-paradise are members of the family Paradisaeidae and have about 14 different genera divided in 41 species. Our interest, however, was to study the Blue Bird-of-paradise, due to some unique particularities in itsappearance and behavior.
- They are also under threat from hunting for their highly prized plumes, thus blue birds-of-paradise are classed as Vulnerable on the IUCN Red List.
- The back of the head has a reddish gloss that stretches down to the mantle, or back.
- Calls such as the low-pitched ‘kouwi-carr-carrr-carr-carr’ and high-pitched ‘kwank’ are common.
- Usually, one egg is laid within brooded over by a very defensive would-be mom.
- The blue bird-of-paradise is one of the most magnificent birds in the world.
This bird is commonly seen in the mid montane forest that is located in the eastern part of New Guinea. It has a black head that stretches at the back and solid bright blue color for its wings and tail with split eye ring and bluish white bill. But what sets the Blue Bird of Paradise a beauty from the rest is the remarkable tail streamers that come in red and blue hues that blend into a blue violet color once it dances for display.
Due to their endemic status within the country of Papua New Guinea, the blue bird-of-paradise is Endangered. They are currently classified as Vulnerable by evaluations carried out by the IUCN in their Red List. Animals that do not make seasonal movements and stay in their native home ranges all year round are called not migrants or residents.
The female bird on the other hand has chestnut-brown underparts and this chestnut-brown plumage can be seen when the bird is in flight. Juveniles are similar to the adult female bird but with darker plumes and a grayish bill. The blue bird-of-paradise is one of the most magnificent birds in the world. Found in the eastern parts of Papua New Guinea, these birds have a striking blue-black coloration.
The blue bird-of-paradise , is a beautiful, relatively large species of bird-of-paradise. It is the only species in the Paradisornis genus but was previously included in the genusParadisaea. Mostly black, this bird of paradise has a bluish-white bill, dark grey legs, and a broken white eye-ring, and bright blue wings.
We already know that the male blue bird-of-paradise is primarily solitary by nature. However, during mating, the male bird is not monogamous and has a reputation of being very promiscuous. The breeding season starts when the males start to display their unique courtship ritual. Perched upside down on a thin branch of a trees, male birds expand and contract their chest fanning out their violet-blue plumes and feathers. This display by males is not aimed at any particular female, but at any bird of the opposite gender that is in the vicinity.
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The family is actually very varied one, but one group of species are known as ‘plume birds’. This name is due to the beautiful lace-like feathers that hang from their flanks and are raised and made to shimmer in the most remarkable displays. Forbidden by his father to marry or live with the woman he loved, the love-lorn pair committed suicide in a pact that rocked Euro.
For more information on other birds, take a look at red bird-of-paradise facts and greater bird-of-paradise facts. Solitary animals are those that live singly and meet only for courtship and mating. Oviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. Terrestrial animals are animals that live predominantly or entirely on land (e.g., cats, ants, snails), as compared with aquatic animals, which liv… Scan the QR code or search “Walmart app” in your app store to download.
Unlike the Paradisaea birds, the male is mostly glossy black overall with silver-white crescents surrounding the eyes . They have a very crow-like bill that is whiteish to light greyish in colour. The back of the head has a reddish gloss that stretches down to the mantle, or back. A defining feature found in both sexes are the shiny, blue wings that are more commonly light blue but can range from light blue, aqua or even a skyish-baby blue; the tail is also like this.
Apart from the head, the other colorful spot in the bird is the eye-ring. The eye-rings are basically the description of the feathers that surround the eye of the bird. The eye-ring is whitish-silver and provides a great contrast to the dark colors of the bird. The feet and legs of the bird are a mixture of purple and gray. The breeding season for the blue bird-of-paradise goes on throughout the year.
Then we saw that when bird faced itself, light was reflected into its eyes, but not only. Then we saw that we could have a a structure of eye which has evolved from an eye which was used for a function that not seeing. Coming back to our Rudolphi bird, we have tried to demonstrate that if in humans light is probably related with lowering/capacity to endure intracranial blood pressure, it could also happen on it. And thinking about it, the effect must be achieved by a certain wavelenght. Because it´s a certain wavelenght that is reflected by the feathers to the male, and not a random one.
It is distributed to mountain forests of southeastern New Guinea. ITIS recognizes only one subspecies, but additional subspecies margaritae and ampla have been described. Blue peafowl spreads his feathers to attract female peacocks at the taman mini bird park,Jakarta. Dull compared to the male, the female is mostly a shade of chestnut brown. So, linking everything, what if that fuction was not lost in lhe evolution?
Illustration of two male and a female, most likely an early conception of the species. The Blue Bird-of-paradise is classified as Vulnerable , considered to be facing a high risk of extinction in the wild. Blue-footed Booby bird on the Galapagos Islands, Ecuador with a pair of young birds. Mounted specimen of a Blue Bird of Paradise hanging upside down on a branch, depicting its habitual position during courtship, at the Field Museum,… An additional subspecies, ampla has been described, but is not often considered valid. If you liked our post, please don’t forget to share this with your family and friends.
Alfonzo Bissonnette is a wildlife conservationist and a television personality. He is 29 years old. When he was just four years old, he found his first dead animal on the side of the road. From that day on, he knew that he wanted to work with animals.
Alfonzo has always been passionate about protecting the environment and its inhabitants. As a child, he would spend hours catching bugs and spiders in his backyard, then release them back into the wild unharmed. He later studied Wildlife Conservation at university, and now works tirelessly to protect endangered species all over the world.
Alfonzo is also a television personality. He has been featured on several shows about wildlife conservation, and has even hosted his own show about animal rescue operations.