Milk from a non-mammal? Some animals do have it but interesting choice. 

Quote from rhelwig >>

 I agree. Also, "see the dark-winged shape of a wyvern carrying its prey" so why doesn't it have a grapple capability? As a DM I'm going to homebrew that if its claw attack succeeds then it can grapple a medium or smaller creature that fails a d20 contest. (i.e. if it hits the target can roll Athletics or Acrobatics to avoid being grappled, but they have to beat the attack roll.)

 You know you can simply choose to grapple instead of making an attack right? Every creature that has any kind of graspers can do it.
Not that there's anything wrong with your idea. It does go against the normal conventions, monsters with grappling attacks usually apply that grapple on a hit with no chance to prevent it. It also raises the question of what it's escape DC is. Does it stay the same or does the wyvern roll an athletics check? Monsters usually have a fixed escape DC to simplify and reduce randomness.

lame. prolly gonna kill this thing next roll

They speak the same language as dragons I believe 

taco

I'm creating a cross between a wyvern a stirge for my fungi controlled stirge army.

is it chromatic

Hold up. Who would win, an Ancient Red Dragon, or 5 Wyverns?

Definitely the Ancient Red Dragon. It will always save on the con save, will always hit them outside of a nat 1, it can frighten the wyverns and is almost never going to be hit due to it's 22 ac.

And now, I become hiccup haddock the third.

Are there any rules for taming one of these? I'm a first-time DM and I want to give one to my players but I'm not sure how.

The maddest of lads

At our next session, our crew will face a cranky wyvern. I am a (black scale) dragonborn druid, and also in the team we have a tiefling bard, an elven paladin and a human rogue. I was wondering if there are any particular weaknesses that wyvern have. I am aware that their 2 primary attacks from from their deadly stinger and impressive jaws. Not to mention their claws. They do love to pick things up then drop them from great height!

Dragons will understand Draconian, according to my DM.

When in doubt when feeding a dragon: Meat, preferably fresh and lightly effected by equivalent breath weapon. (chilled meats for baby whites, lightly seasoned with deadly poison for greens, barely charred for reds, etc.)

Since wyverns do not appear to have a breath weapon, just use fresh meat, still bloody.

What a beast of a creature.

Tried to cut the tail of one while it was paralyzed. Got stabbed in the stomach for about 30 something damage I think.

8/10. Cool fight, took an hour of planning, 3 minutes of fighting, almost died.

This would be far better than a hippogriff for a mount. It would be worth the effort, for certain.

I look forward to making an army ridng on these with the party being blindsided

SkyWing from wings of fire