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JOrnitho



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ссылка на сообщение  Отправлено: 25.03.22 17:24. Заголовок: Galliformes and other animals for South America


Hello! I'm back with ideas for some new species for South America. I found in my computer an archive with some ideas for fauna and flora that I had some time ago and decided to show there to ask your opinion about them. The first is about a descendant of the domestic chicken.

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I also have in this archive some names for possible species that I never developed bayond some few facts. Maybe someone could help me make their descriptions.

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ссылка на сообщение  Отправлено: 19.08.22 20:34. Заголовок: JOrnitho Yes, no pr..


JOrnitho
Yes, no problem. I meant that before this idea of yours, no hybrids were present in Neocene as holocenic ancestors. It was initially based on "pure species", sometimes peculiarly moved to other, more or less remote locations (see the Baikal beaked dolphin), but never genetically crossed with their relatives.

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ссылка на сообщение  Отправлено: 20.08.22 06:10. Заголовок: Биолог пишет: Yes, ..


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Yes, no problem. I meant that before this idea of yours, no hybrids were present in Neocene as holocenic ancestors.


Ah, right. Do you have sugestions for the name of the genus? I was thinking that they would have a typical manakin "dance" and iridescent blue feathers in the crown.

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ссылка на сообщение  Отправлено: 20.08.22 10:04. Заголовок: JOrnitho Wow, beaut..


JOrnitho
Wow, beautiful pre-description! The name... Maybe, traditionally (for neocene) based on local words for manakins and that iridescence?

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ссылка на сообщение  Отправлено: 20.08.22 14:29. Заголовок: Since their Brazilia..


Since their Brazilian common name, Tangara, is already the genus of other species, maybe their name could be atacaran (from the Tupi ata:walk/arã:around) or saltarin (a Castellan name). Which name seems better?

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ссылка на сообщение  Отправлено: 20.08.22 18:17. Заголовок: JOrnitho Atacaran s..


JOrnitho
Atacaran seems OK.

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ссылка на сообщение  Отправлено: 21.08.22 04:50. Заголовок: I finished the descr..


I finished the description of the manakin. I also made one about a forest falcon that could appear in the chapter about the Atlantic forest. I plan to give it some edits and add other species to the genus.

Crested singing falcon (Canorofalco cristatus)
The human actions during the Holocene caused the decline of many species. However the species that were resilient enough survived, with their descendants now living in the Neocene. The laughing falcon (Herpetotheres cachinnans) was a widespread species that lived in mostly of tropical South America. It had survived the degradation of the environment by humans and gave rise to the genus Canorofalco, the singing falcons. Its members are restricted to humid tropical and subtropical forests, with the type species, the crested singing falcon, inhabiting the Atlantic forests of Northeastern and Southeastern South America.

The crested singing falcon has 53 cm of length and a wingspan of 84 cm. Like most birds of prey, the female is heavier than the male. The adults have a gray back and wings. The breast and belly are white. The head has a broad black face mask that stretches across the neck as a narrow collar, bordered with white. They have a cinnamon crest that can be erected when they are excited or trying to intimidate an adversary. The tail is black with a white tip and a white band in the middle. In flight, they have a shape closer to a hawk than most of its falcon relatives, with short, rounded wings and a long tail. The legs and beak are yellow.

This species feeds primarily upon small birds, mammals (mainly rodents and marsupials) and squamates. They often hunt prey by sitting quietly on tree branches and waiting for their victims to appear. When the prey arrives, the forest falcons quickly ambush them, attempting to catch them with a brief, flying pursuit.

As their name says, the crested singing falcon is a very vocal bird. Their vocalization can be heard during the entire day, with pairs doing duets. They do not build a nest, but lay their two or three white eggs in cavities in trees. Laying occurs mainly late in the dry season, with hatching taking place at the onset of the rainy season, a time of increasing prey abundance. Eggs hatch 34 days after being laid, and nestlings fledge 42 days after hatching. Fledglings disperse from their parents' territories within four to seven weeks after fledging, achieving independence at that time. Nesting territories are occupied year after year. They reach sexual maturity with three years and have a lifespan of 18 years.



Sapphire-crowned saltarin (Atacaran splendidus)

The human actions during the Holocene caused the decline of many species. However the species that were resilient enough survived, with their descendants now living in the Neocene.The golden-crowned manakin (Lepidothrix vilasboasi), a species with a hybrid origin between the opal-crowned manakin and snow-capped manakin (Lepidothrix vilasboasi), survived the anthropogenic onslaught by finding refuge in inaccessible areas of the Amazon rainforest.

There, this species continued to evolve, giving rise to the Genus Atacaran, from the Tupi tata: walk and arã:around. It’s a reminder of the courtship display made by the males, which is several jumps. It also has genes of other Lepidothrix birds that ended up stranded in these forests and hybridized to a lesser extent with the golden-crowned manakin.

When the forest started to recover, this genus spread to other areas of the rainforest. The type species is the sapphire-crowned saltarin, an inhabitant of the “terra firme” rainforests understory of the Amazon Basin. The word saltarin is from Castellan language and refers to the male’s jumps during courtship.

The sapphire-crowned saltarin is a small bird, they have 9 cm of length. Like all the manakins, all the representatives of the genus are sexually dismorphic. The male have bright green feathers in their upperparts, while the underparts are bright orange. They have a blue crown, which is the result of structural colors produced by different nanostructural organizations of the feather barb keratin matrix. Their secondary feathers are bright yellow. The female is mostly dull green, with a pale yellow in the belly. They lack the blue crown.

Blue-crowned manakins are frugivores. Their diet includes fruit from Melastomataceae, Moraceae, Bromeliaceae, and Araceae. They can participate in mixed flocks, with their preferred food being arthropods, including ants, flies, and other small insects. While catching arthropods, their hunting technique was often a sally-strike or sally-glean off of live foliage.

Breeding season coincides with the dry season. Males form leks of up to seven males. Adult and juvenile males form territories though juveniles are unable to maintain their own territory. Their territories range from 209 to 5050 m² in size. They defend their territory and attract mates through song. They perform their songs on song perches that are horizontal or slightly angled twigs. Their display courts are 3–5 m in diameter and are located close to the ground in the open understory. They use up to two courts at a time, but courts can change location annually. Their courtship consists of the males constantly jumping around the female. They’ll bow to her, showing their blue crowns and opening their wings to reveal their yellow primaries. Female's home ranges overlap with one lek on average.
Sapphire-crowned saltarin make simple, open-cup nests using dry palm, dry leaves, andbark externally. The internal lining of their nest is pale brown, but can also be whitish or yellow. They use spider webs to secure their nests to the tree. They chose small shrubs and treelets that are less than 1 meter tall and place their nests on horizontal forks. Females are the sole nest builders and take care of their offspring alone. They lay two eggs per clutch. She incubates them for 19 days. The chicks fledge within 21 days, but remain being fed by the mother for more than three weeks. Sexual maturity is reached with 7 months and they have a lifespan of 8 years, but males are killed by predators before that.
The Sapphire-rumped saltarin (Atacaran serrana) is another representative of this genus. This species inhabits the forests in mountainous areas of the Amazon, replacing the sapphire-crowned saltarin in these areas. They have 8,5 cm of length. The plumage of the males is similar to that of their relatives, with the exception of their bright blue rump and white primaries and secondaries.

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ссылка на сообщение  Отправлено: 21.08.22 09:59. Заголовок: JOrnitho Both are g..


JOrnitho
Both are good!

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ссылка на сообщение  Отправлено: 25.08.22 10:13. Заголовок: JOrnitho By the way,..


JOrnitho
By the way, you mentioned birds of hornero family in Indian ocean islands topic. Do you think horneros can become social and build community nests, like sociable weaver of Africa? Would be interesting!

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ссылка на сообщение  Отправлено: 25.08.22 12:11. Заголовок: Биолог пишет: Do yo..


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Do you think horneros can become social and build community nests, like sociable weaver of Africa?


I think that it's possible. How do you see the form of these nests? Maybe something like this one, but more elaborated? Or do you have something different in mind?

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ссылка на сообщение  Отправлено: 25.08.22 13:44. Заголовок: JOrnitho How do you..


JOrnitho

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How do you see the form of these nests? Maybe something like this one, but more elaborated?


I think it could be just like the one on your image, but higher, up a tree trunk, about 10 storeys or so, and more than one "pillar" side by side! But it can also be in horizontal rows on tree branches (thick enough to hold them, of course), probably in 2-3 storeys in this case.

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ссылка на сообщение  Отправлено: 25.08.22 15:06. Заголовок: Биолог I like the id..


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I like the idea of them making pillars, similar to a building with apartments. Maybe these birds can make their nests at the same time, with pillars being attached to the sides of each other. Also, the walls of the nests would need to be thick to sustain the weight.

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ссылка на сообщение  Отправлено: 25.08.22 20:51. Заголовок: JOrnitho Yes, quite..


JOrnitho
Yes, quite possible. Can you describe the bird? Then, I'll try and help you to describe parasites and/or commensals of their nests, or maybe predators like snakes or birds of prey that would hunt them. Just imagine a chapter named kinda "A Stone Condominium"!

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ссылка на сообщение  Отправлено: 25.08.22 21:29. Заголовок: Биолог пишет: Can y..


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Can you describe the bird?


Of course!

Биолог пишет:

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Then, I'll try and help you to describe parasites and/or commensals of their nests, or maybe predators like snakes or birds of prey that would hunt them. Just imagine a chapter named kinda "A Stone Condominium"!


I like this idea! It could happen in gallery forests in central South America, an area where horneros used to live in the Holocene. We could have "posseiros" (individual who occupies vacant or abandoned land and starts to cultivate it) or invaders in these "apartments".

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ссылка на сообщение  Отправлено: 26.08.22 08:40. Заголовок: JOrnitho Yes! I agr..


JOrnitho
Yes! I agree.

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ссылка на сообщение  Отправлено: 26.08.22 16:45. Заголовок: Биолог I finished t..


Биолог

I finished the description of the bird. What do you think? You can give suggestions of other species for the genus.
We can start to talk about the other species that can appear on this chapter.

White-throated obrero (Sociofurnarius albogullaris)
In the Neocene, several new species appeared. While some of them were morphologically similar to their ancestors of the Holocene, they developed habits that were far different from them. An example is the genus Sociofurnarius, the obrero birds. The name obrero means worker in Spanish. These birds are direct descendants of the horneros and like their ancestors, they build their nests as structures made of mud and other materials. However, different from them, these birds are very gregarious, forming flocks of 20 or more individuals. Such lifestyle reflects also in the construction of their nests, with these individuals working together to make large structures that resemble a building with apartments. The type species of the genus is the white-throated obrero, an inhabitant of the savannas and gallery forests of Central South America.
The white-throated obrero has 15 cm of length and 37 cm of wingspan. Like all the furnariids, their plumage has different shades of brown. Their upperparts and wings are reddish-brown, while the underparts and tail are light brown. They have black stripes around their eyes and a white throat. The legs and beak are pale gray.
These birds feed on insects and other arthropods obtained by foraging on the ground while walking. They forage in flocks, with birds of other species following them. Songs in the white-throated obrero are sexually distinct. The rapid trill that is usually heard as part of the duet is faster in the male, slower in the female, and both beat their wings at their sides while singing and the wings beat at the same rate as their trill.

The white-throated obrero breeds in the austral summer. The species is monogamous and the pair bond is long term, sometimes for life. The nest of the species is typical for the genus, the breeding pairs of the flock make their nests one over the other, giving it the appearance of a building with each nest entrance being a floor. Such structures can have at least five "floors", but other "buildings" are made close to each other, which make the entire "building" look like a wall with several holes. These nests are built in tree branches or over large rocks. Pairs remain together throughout the year and will work on the nest during that time. The first nests to be built will be those in the base of the "building". Those are usually made by the oldest birds in the flock and its construction influences the others to start their own. A clutch generally contains two to four eggs. The eggs are laid every second day and incubated for 14–18 days. Chicks are fed for 23–26 days before fledging; young birds remain in the parental flock, but can disperse to others around 6 months after fledging. Both parents incubate eggs and feed the young. Obreros may or may not reuse nests, therefore it is quite common to see several abandoned "buildings". However, a formerly unused nest may be repaired for a new breeding season. They reach sexual maturity with 9 months and have a lifespan of 12 years.

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ссылка на сообщение  Отправлено: 26.08.22 17:57. Заголовок: JOrnitho Great! So ..


JOrnitho
Great! So we got started!

 цитата:
We can start to talk about the other species that can appear on this chapter.


I think yes, but I must think on what parasites or commensals could be there.

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ссылка на сообщение  Отправлено: 27.08.22 16:21. Заголовок: Биолог I was thinkin..


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I was thinking that there could be a species of dwarf falcon that nest in the apartments that were left vacant and end protecting the entire colony against predators. Perhaps a descendant of the Falco sparvevirus

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ссылка на сообщение  Отправлено: 27.08.22 17:52. Заголовок: JOrnitho Good idea!..


JOrnitho
Good idea!

 цитата:
dwarf falcon


It can be named the dwarf kestrel, taking into account the ancestor you mentioned, eh? But how small will it be? The size of a sparrow or of a common starling?

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ссылка на сообщение  Отправлено: 27.08.22 18:17. Заголовок: Биолог пишет: It ca..


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It can be named the dwarf kestrel, taking into account the ancestor you mentioned, eh? But how small will it be? The size of a sparrow or of a common starling?


It's a good name! Given the necessity of it needing to stay inside the nest of the obrero, I think that it could have the size of a sparrow, between 14 and 18 cm. Due to this size, I think that it would hunt more arthropods than other vertebrates, only if they are small enough to be captured.

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ссылка на сообщение  Отправлено: 28.08.22 11:53. Заголовок: JOrnitho OK, I agre..


JOrnitho
OK, I agree!
I found information that horneros are hosts for nest parasitism of the shiny cowbird. Maybe we can have a descendant of the cowbird as a nest parasite of obrero?

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