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:icondinosaurzzz:
Dinosaurzzz Featured By Owner Jan 27, 2017
What kind of metabolism does the dragons have? Warm- or cold-blooded, or something else?
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:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Jan 27, 2017  Professional General Artist
Mesotherm for the most part, but some species like Cryopterus lean more toward the endotherm spectrum
while the species Allipolestes can in a way witch back to a ectotherm metabolism to lose less energy.
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:icondinosaurzzz:
Dinosaurzzz Featured By Owner Jan 27, 2017
Ah, I see. Thanks!
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:iconjoserobertorn:
JoseRobertoRN Featured By Owner Sep 11, 2016
¡Me encantan tus obras! Nos ofrecen una imagen más realista y biológica de los dragones.
Solo hay unos detalles, no los veas como errores, mi intención es ofrecerte una critica constructiva :) 
Bueno, para empezar, he visto que todos tus dragones tienen las patas libres incluyendo los cuadrúpedos, considero que esos debería tener el patagio extendido hasta sus extremidades posteriores; en las aves y tus dragones terópodos se es justificable porque las piernas actúan de manera independiente de los brazos/alas; mientras que los cuadrúpedos empezaron con el planeo (piel que abarcara todo su cuerpo), solo con ver los pterosaurios y los murciélagos se tiene la prueba.
Por otro lado, aunque me gustó la idea de justificar el aliento de fuego por veneno; para una criatura voladora y activa, no creo que eso sea necesario, si las aves no lo necesitan, los dragones tampoco, otra cosa, tal vez los especímenes gigantes pudieran haber existido en la prehistoria, pero en la actualidad dudo que los sobrevivientes superen los dos metros de envergadura. 
En cuanto a las alas, les pusiste cuatro dedos a los terópodos, cuando en realidad son tres; pero dentro de lo que cabe, no están mal, sin embargo creo que también les quedaría bien modelos alares más aviares como la "skillshare class creature" de arvalis o el del vídeo "how to find your dragon" en el minuto 2:10.
Ya por ultimo, y más que critica, es una idea, es que todos los dragones del mundo son tipo occidental, yo creo que pudiste ser un poco más fiel con los otros tipos (como el chino por ejemplo). Yo en lo personal, a veces acostumbro a hacer más de una versión del mismo espécimen (solo que ahora acabo de registrarme a esta pagina, así que por ahora no tengo que mostrar :B)
 Espero que mi aporte te sirva de algo.

I love your work! We offer a more realistic and biological image of dragons.
There are only a few details, see them as mistakes, my intention is to offer constructive criticism :)
Well, for starters, I've seen all your dragons have the free legs including quadrupeds, I believe that these should be extended to the patagium their hind limbs; in birds and theropod your dragons it is justifiable because the legs act independently arms / wings; while quadrupeds began with the plan (skin covering his whole body), only to see the pterosaurs and bats have tested.
On the other hand, although I liked the idea of ​​justifying the breath of fire by poison; for a flying and active creature, I do not think that's necessary, if the birds do not need it, dragons either, else, perhaps the giant specimens may have existed in prehistoric times, but now doubt the survivors exceed two-meter wingspan.
As for the wings, you put them four fingers to theropods, when in fact there are three; but as far as it goes, they are not bad, but I think that also would do well models avian wing as the "skillshare class creature" of arvalis or video "how to find your dragon" 2:10 minute.
And finally, and most critical, it is an idea, is that all the dragons of the world are Western-style, I think it could be a little more faithful to the other types (like Chinese for example). I personally, sometimes usually do more than one version of the same specimen (only now just signed up to this site, so now I have to show: B)
 I hope my contribution helps you something.
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:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Sep 11, 2016  Professional General Artist
Thanks for the comment. 

Most of what you criticized here is because some of my older stuff isn't updated yet, or because 
you may have missed some details.

1. All my dragons are able to be go on all fours or on two legs.
I'm not really sure which what you mean after that but I guess you suggest to include the legs into the patagium.
Beside one species I haven't done that because especially the Aquilapoda use their legs in a similar fashion to some hawks 
and eagles. In addition in newer versions the patagium reaches over the base o the tail.
In very early dragons a patagium spanned between hands and hip, and another between legs and tail, the later was lost in nearly all 
dragons later.

2. The poison of dragons has different functions beside helping the animal to hunt down it's prey on some occasions.
It is of course a defensive weapon but it evolved mainly to help with digestion, to loose weight dragons shortened their intestine
and expanded their air sac system. To still digest properly the venom glands you can also find in other varanids evolved.

3. Only because it is prehistoric doesn't makes it giant. And the largest dragons today aren't giant either compared to
the inventions of the fantasy literature. And the largest species today are very rare now, hunted nearly to extinction.

4. Dragons are not dinosaurs.

5. You may have noticed that these animals don't represent the mythological creatures, I hate it the way the "Draconology" books did it. 
These animals were merely inspirations for the myths we know today. The artists nearly never saw their subjects and many stories were told
many times before someone wrote them down or painted a picture of the creature. Dragons were already rare when humans learned to write
and it didn't became better over time.
Also the Draconiformes weren't the only animals which contributed to the artistic traditions of dragons. Some European dragons are shown with
bird wings, or several heads, Chinese dragons are also known with wings etc. Depicting animals without ever seeing them has a long tradition,
look at early depictions of elephants or other beasts, they don't have much in common with the animals we actually know.

In addition some design of my Orientalosaurids will change a little bit.

 
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:iconjoserobertorn:
1- Si, Inclusión de las piernas en el patagio en las especies cuadrúpedos. Perdón por no ser muy claro en eso.
2- Tiene sentido lo del veneno en relación con sus parientes vivos y evitar cargar demasiado peso. Ahora que lo dices, tu aporte suena aceptable si su método de caza consiste en que ellos muerden a su presa después de haberla capturado (como un águila o raptor le da la mordida de gracia a su presa tras aferrare a ella), cosa que me imagino que querías dar a entender desde un principio; Al principio pensé en algo más parecido al dragón de komodo: morder a su presa y dejarla ir.
3- Ok. 
4 & 5- Ya, veo. Yo no sabía que todos tus dragones eran varanoides. Los bípedos parecen terópodos. Eso anula mi sugerencia sobre las alas.
Por cierto, considerando que el dragón chino/oriental es de agua, yo lo asocio más a tus mosasaurios (podría decirse que las antiguas imágenes de serpientes marinas sean sus primeras interpretaciones).

1- Yes. Inclusion of legs in the patagium in quadrupeds species. Sorry for not being very clear on that.
2- It makes sense about the poison in relation to their living relatives and avoid carrying too much weight. Now that you mention it, your contribution sounds acceptable if your hunting method is that they bite their prey after it is captured (such as an eagle or abductor gives bite grace its prey after'll hold on to it), which  I imagine you wanted to understand from the outset; At first I was thinking of something more like the komodo dragon: bite their prey and let it go.
3- Ok.
4 & 5- I see. I did not know that all your dragons were varanoides. The Bipedal ones appear theropods. That nullifies my suggestion of the wings.
By the way, considering that the Chinese / Oriental dragon is from water, I associate it more with your marine species (arguably the ancient images of sea snakes are the first interpretations of mosasaurs).
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:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Sep 20, 2016  Professional General Artist
2. There are several ways dragons use their venom, especially when being defensive they use it
by spraying it in the face of their enemy, something rarely used on the hunt.
Here they mostly, as you suggest hold the prey down and bite it then, or in case of larger animals
they fly close and bite once. A few species also spit into the face of their prey while flying.

4-5. As I said the creatures have rarely one inspiration source, here indeed sea serpents (natrixosaurs), for example
Jangtsenatator, played a role. In addition dragons like Confuciosaurus live most of their early years semi aquatic until their
wings become large enough to carry them.
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:icongreekrandomness:
Will you be continuing the project? Almost as though a new discovery has been made in the world of the dragons?
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:iconhyrotrioskjan:
Hyrotrioskjan Featured By Owner Sep 11, 2016  Professional General Artist
My newest deviation isn't that far back!

Yes, I will continue this project.
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:icongdog00:
gdog00 Featured By Owner Jul 18, 2016
So, quick question dude. 

I was watching a vid that said large pterosaurs evolved shorter tails to prevent drag. 

So how do larger dragons deal with drag?
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