Yutyrannus's Prehistoric Art

[Yutyrannus]

Finished and revised Velociraptor vs. Khaan drawing. I fixed the wings and thighs on the Velociraptor. Velociraptor coloration is based on Red-tailed Hawks, Khaan coloration is based on Wild Turkeys.

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[ZoPteryx]

I like how you use modern animals for coloration inspiration!

[Yutyrannus]

I like how you use modern animals for coloration inspiration!

Thanks. Here is my finally finished Deinonychus drawing. This time I went for a new way of drawing the fenestrae, I think it looks a lot better  .

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[wings]

Without getting into too much about anatomy or proportions. Perhaps one element to look at is the kind of angle that the (primaries) wing feathers "should" attach to the digits.  Especially the distal ones (near the wingtip), these feathers tend to come out less than 90 degrees and almost running parallel to the wing finger. As in the following examples (please see below):

http://www.pfeil-verlag.de/07pala/abb/4_08d9.pdf
http://www.pfeil-verlag.de/07pala/abb/3_76d6.pdf
http://archosaurmusings.files.wordpress.com/2010/02/sin-manus378.jpg
http://i765.photobucket.com/albums/xx298/Albertonykus_borealis/Misc/AnchiornisFossil.jpg
http://www.bi.ku.dk/dna/course/papers/I1a.xu.pdf
http://go2add.com/images/birds/image034.jpg

I suppose if the feathers on the wingtip ran at an 90 degrees angle like how your drawings implied, then these animals probably wouldn't need try and develop a tight wing folding system at their wrists as well. They can just let the fingers pointing straight down with a slight bend at the wrist and have their wing feathers trailing behind them. I've been rambling too much again so I'll stop here 

[Yutyrannus]

Without getting into too much about anatomy or proportions. Perhaps one element to look at is the kind of angle that the (primaries) wing feathers "should" attach to the digits.  Especially the distal ones (near the wingtip), these feathers tend to come out less than 90 degrees and almost running parallel to the wing finger. As in the following examples (please see below):

http://www.pfeil-verlag.de/07pala/abb/4_08d9.pdf
http://www.pfeil-verlag.de/07pala/abb/3_76d6.pdf
http://archosaurmusings.files.wordpress.com/2010/02/sin-manus378.jpg
http://i765.photobucket.com/albums/xx298/Albertonykus_borealis/Misc/AnchiornisFossil.jpg
http://www.bi.ku.dk/dna/course/papers/I1a.xu.pdf
http://go2add.com/images/birds/image034.jpg

I suppose if the feathers on the wingtip ran at an 90 degrees angle like how your drawings implied, then these animals probably wouldn't need try and develop a tight wing folding system at their wrists as well. They can just let the fingers pointing straight down with a slight bend at the wrist and have their wing feathers trailing behind them. I've been rambling too much again so I'll stop here 

No that's fine, thank you for telling me. I was about to start a Troodon, and if you hadn't told me I would have done the wings the same way.

[wings]

Having said that it seems like there "could be" some kind of mobility on these distal wing feathers (see: http://archosaurmusings.wordpress.com/2010/03/04/why-microraptor-should-never-be-drawn-the-same-way-again/ ) as suggested by Scott on the above post. One of Scott's reasoning is feather movement allows the feathers to stack up during wing folding, but I'm not sure whether it (feather movement) really is a  necessity in this movement, feather shafts are quite flexible, when the wing folds all the elements (humerus, radius & Ulna, and manus) seems to be bending at different angles in relation to each other rather (at the elbow and wrist) than in a straight line. Hence, the lower arm (radius and ulna) overlaps the upper arm (humerus) on the side while the wing tip folds inward and this I think would probably be enough for the feathers to "stack".  It is very likely that birds can control their wing feathers (they have the muscles for them, like the expansor secundariorum), a few degrees of movement is very likely. However, we have no idea whether any dromaeosaurs have these muscles and even if they do I'm not sure whether they could move the feathers perpendicularly to the wing digit.

[Yutyrannus]

Troodon wondering what this "living rock" that it's holding is.

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[Yutyrannus]

Finished Troodon. Colors based on a Red Fox.

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[Balaur]

Finished Troodon. Colors based on a Red Fox.

Very cool! They surley where smart like foxes.

[Yutyrannus]

WIP of my most recent drawing (apart from a Jeholornis that I have yet to post). Can anyone guess what it is before I reveal it. HINT: Someone else on the forum has made it as well.

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[Yutyrannus]

Finished Troodon. Colors based on a Red Fox.

Very cool! They surley where smart like foxes.

I agree, that was partly my reasoning. Also, they probably filled a similar nich.

[Yutyrannus]

Finished drawing. I will now reveal what it is-Smok Wawelski.

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[Balaur]

Finished drawing. I will now reveal what it is-Smok Wawelski.

Nice! The best prehistoric creature to ever roam my country! (I'm from Poland if you don't know where this beast is from)

Also Smok is Polish for dragon. Thought you should know a bit of cool naming.   

[Yutyrannus]

Finished drawing. I will now reveal what it is-Smok Wawelski.

Nice! The best prehistoric creature to ever roam my country! (I'm from Poland if you don't know where this beast is from)

Also Smok is Polish for dragon. Thought you should know a bit of cool naming.   

You're from the same country as Smok! Awesome! Also I knew that Smok means dragon (I REALLY like dragons by the way ). But thanks for telling me anyway .

[TheAllosaur]

Aha, a Smok, sweet!
I love it. I had no idea that it was possibly quadrepedal. I can only see it bipedal though.
Still an awesome drawing!!
The Yutyrannus will be drawn soon!

[Yutyrannus]

Aha, a Smok, sweet!
I love it. I had no idea that it was possibly quadrepedal. I can only see it bipedal though.
Still an awesome drawing!!
The Yutyrannus will be drawn soon!

Thanks for the compliment. Also I will tell you that it's kind of ironic that you are drawing a Yutyrannus now, as I recently decided to re-do my old one (I spent like 2 hours yesterday looking up references). I can't wait to see your reconstruction of the beautiful feathered tyrant. I was just trying out the quadrapedal look since most of it's relatives were probably quadrapedal, also based on it's relatives I think Smok may have been too front-heavy to be a biped. But that's is just a theory.

[TheAllosaur]

i didn't think of smok that way. That is cool ideas.
I also have some cool ideas i'm doing. Have you heard of Segisaurus, the little coelophysid found without a head? Well,  I wanted to draw a JP dilophosaurus, but without the frill, so that was my solution. It's gonna be awesome 
I am also (since i'm home sick) gonna finish several pictures today, including the Yutyrannus, so...
Yeah!
I love the little foxlike troodon. That's how I see them too

[Yutyrannus]

i didn't think of smok that way. That is cool ideas.
I also have some cool ideas i'm doing. Have you heard of Segisaurus, the little coelophysid found without a head? Well,  I wanted to draw a JP dilophosaurus, but without the frill, so that was my solution. It's gonna be awesome 
I am also (since i'm home sick) gonna finish several pictures today, including the Yutyrannus, so...
Yeah!
I love the little foxlike troodon. That's how I see them too

Thanks. I saw your Segisaurus I think it's really cool! Also I think the Troodon is the best drawing I've done so far. Since it turned out so well I plan to do a Sinovenator soon. Also my next drawing is a Majungasaurus, it will hopefully get done soon.

[TheAllosaur]

Sounds awesome!! I love Majungasaurus. Seen Mine?
I only have to do the tail and backround, then the Yutyrannus will be done!

[Yutyrannus]

Sounds awesome!! I love Majungasaurus. Seen Mine?
I only have to do the tail and backround, then the Yutyrannus will be done!

I have seen yours and it's really cool . About the Yutyrannus, I can't wait.