Personally either focus on going big and ramp, or instead opt for smaller creatures with lower costs and insane perks or upgradability . Also If i was gonna go big and include eldrazi i couldnt ignore the Big E, Emrakul, the Aeons Torn .Yes the above statement ornis and birds with rancor or might of oaks can do big unexpected damage, (cant tell u play tactics lol) but i would be worried about getting my bigs out and then what can i do to keep keep them afteri get them rather than little damage while waiting to get my bigs. Also have you considered quicksilver amulet. Sorry dont have more time at the moment buddy but if u see me online message me and enjoy the lotu/warps. lol

Also look into no real colors, artifact and colorless mana producers, myrs, urza buildings , etc and im only recently back after berak since ice age so i not familiar with thousands f cards still

See the other aspect of Ornithopter is to put a card like Argentum Armor or Heartseeker on them in order to make them good early and late game cards

Overgrown Battlement , Quicksilver Amulet

I like the Quicksilver Amulet it would be great for this deck I think about adding that for sure. Also the wall would be a interesting idea but the deck is already getting really big. I was thinking maybe of taking out Tangle Golem and Ivy Elemental as they dont fit with the deck that much, maybe take out 2 Icy Manipulator ? any thoughts?

Dude, I think you must have a focus. Kind of, knowing exactly what you want to do with this deck, and seeking consistency to it. Try to have it at 60 cards, and have multiples copies of the necessary cards, like you made with Birds of Paradise... If not, you'll get only a random deck.
I'd take off the Ivy Elemental for sure, it seems kind of weak on my thoughts; Tangle Golem is nice but you can get better stuff.
I'd suggest running four Elvish Piper and 4 Quicksilver Amulet to have eight ways of puting a fatty creatures out for few mana. It's a cool trick!
Also, I don't think Myr Enforcer and Ornithopter are big deals, so you could try the Battlement for a little, it has a nice mana flow. And maybe Steel Wall to help the ramp...

I made some changes like you said personally I like Ornithopters as a cheap blocker that flys and can be buffed with Argentum Armor late game or Might of Oaks earlier game. I also am trying to make this deck in real life which is also one of the reasons for some of the cards in here. $120 on 4 Kozilek, Butcher of Truth and $70 each Eureka is not really doable for me. Do you like the idea of Defense of the Heart , Tooth and Nail , and Worldly Tutor ? Just thoughts to consider.

Defense of the Heart and Tooth and Nail are incredible cards! If you can get those, go for it and use them! I'd love to have them too, but they are somuch expensive where I live!
As for the Worldly Tutor, I think it's actually a thing! I mean, if you have the amulet in play but don't have critters in hand, tutor for one at the end of opponent's turn and yay!

I'd recommend Worldspine Wurm and Engulfing Slagwurm if you're looking for low dollar creatures with good power/abilities. The Worldspine Wurm is a 15/15 trample that turns into three 5/5 tramples is always nice, and it shuffles back if it would ever go to the grave. I run them in my Subterranian Colossus deck and they always end the game quick while Engulfing Slagwurm is a near invincible attack/defence option with insane life gain potential.