You made a typo, Magistream

[xmands]

In the adult description of the clostra crystal wings, towards the end: "They are always striped, with females being dark blue and white. Males are green and black in color. Their curved horns are gold in color, and quite sharp. " This seems to imply that both have gold horns - in reality only the male does, the females have red horns.

[BBkat]

I guess this counts as a typo(and I wouldn't have noticed it had someone not pointed it out).
This is a line from the adult Khatash's description-

When a khatash has finished its growth, sometime between its second or third year of life, it stands ten to fifteen hand spans tall. Though small, a khatash will not hesitate to attack much larger creatures if provoked,

This is, a bit contradictory.
I measured my handspan(fingers together, thumb to pinky) and that was about 4 inches, so I'm working off that. That means these would be roughly 40-60 inches tall(either at shoulder or head). That is, not small at all, that is taller than a Cougar, the largest big cat in North America.
On the small side(10 handspans) it's 3.3 feet, midchest on me. On the tall side(15 handpsans) it's almost as tall as I am, 5 feet. So, unless all the magi here are giants, that is one big cat.
Now, if I could buy that as a size from nose to tail and it being say, bobcat sized.

edit:
A, I guess, typo from the Crystalwing (adult) descriptions(all of them).

Finally this small bird has reached adulthood, standing almost as high as your chest.

According to Rijolt, who initially designed them, they are dragons, not birds. Feather winged dragons, but dragons nonetheless. I even found a comment of theirs from their dA page on that->
http://comments.deviantart.com/4/2688816/2189198465

Also, the Pygmy Gemdragon/Crystalwing descriptions call them dragons. If Pygmy Crystalwings (which also have feathered wings) are dragons, why are regular crystalwings not dragons? And besides, who ever heard of birds with 4 feet?
Calling them birds just seems really weird.

[xmands]

In the hatchling description of the Piasa Bird, third sentence

Then the the bird's magi can truly take in the beauty of their new companion.

Just an extra "the" thrown in there!

[xmands]

Crystal Rykeir, hatchling description, second sentence.

They appear as nothing more than a darting purple shape, and rarely remai in one place for long.

There is a missing n in "remain."

Tempest Storm Steed, adult description, eighth sentence.

Should any other animal consume the grass, and they will be able to move at great speeds for an hour or so, and sometimes even create a few lightning bolts.

The first "and" is not necessary - should it say instead "Should any other animal consume the grass, they will be...."

[RenYnde]

In the screencap below I would like to point out, in the Mass Move function, that there is the letter i in the word "Parents" that doesn't belong there in the "No Parents" field.

[Splashpool]

In the Swirled Winged Cat description, it says, '...eyes, one green and one blue...' despite the image very clearly showing one green and one yellow/amber eye. Hope that counts

[CrashBomb]

Uh



Snipped from the Noctis Enox description.
Are the question marks supposed to be there?

[Silencefalls]

In the description of Baku, you forgot to capitalize their name.

Sometimes, if you just glance at a baku out of the corner of your eye, it seems to be wavering, almost see-through.

[ApprenticeCrone]

Chinchilla egg description starts "here is" instead of "There is"

[MothballMilkshake]

Not quite a typo, but in the razan orchid hatchling description it says 'They are able to produce a scent that makes most predators disinterested'

This is from dictionary

usage: One of the most contended questions of usage is the difference between disinterested and uninterested. According to traditional guidelines, disinterested should never be used to mean ‘not interested’ (i.e., it is not a synonym for uninterested) but only to mean ‘impartial,’ as in the judgments of disinterested outsiders are likely to be more useful.

So I think you mean UNinterested, not DISinterested