This is actually really well-drawn!
Let me start by saying that I'm no artist. If there's one thing I can't do, it's draw. Still, it doesn't take a genius to recognise that this is really well-drawn. I compared it with the original picture that you redrew (I'm assuming it's this one: http://velofille.com/old/parrot_pics/Eastern%20rosella3.jpg) and they really match in terms of colours and proportion. Nice work!
The colours you used were pretty good. Maybe you could've used a richer shade of red, like in the original picture, and made the tail a bit more appealing to the eyes in terms of colours (you only used two shades of blue for the tail). Also, compared to the original, some of the colours aren't as bright as they could be, which leads to a bit of a dull presentation colour-wise. Still, you mixed in the colours very well, especially in the top part of the bird. Shading could use a bit more work, namely on the branch that the bird is perched on, but other than a few quirks the colour scheme and shading were done right.
What I probably liked the most about the picture is that the proportion was just right. The angle of the bird's head was perfect and the branch was particularly well-drawn, especially the part behind the bird. Regarding the background, it is a bit minimal I guess, so I would've liked a few subtleties in the background such as leaves, but maybe the minimalistic background was intentional to give more attention to the bird.
Now to nitpick - on the whole it looks like you paid attention to detail, but when viewing it full size, I can see a few loose ends you can tie up, like one of the bird's claws, which is supposed to be behind the twig but it is actually going through it. There's a bit of colour jotting out of the tip of the tail too. Still, these are just minor problems, nothing much to worry about.
So yeah, this is very well-drawn, especially in terms of proportion, and the colour scheme is good too. There are just a few minor problems here and there which need fixing. Keep it up.
8/10
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