Arcticuno, the first bird, is in the Seafoam Islands, after you solve a block puzzle. Bring Strength and Suft with you, as well as an escape rope and Fly.
Zapdos is in the Power Plant, East and then North of Cerulean City. You will need Surf to reach him. He's at the end of the Power Plant.
Moltres is a tricky one, because in Red he's on the Victory Road, in plain sight, but in FIREred, he's in the Sevii Isles. Bulbapedia (Google it) could tell you which island if you need to know.
^^ moltres is on island one. go to the north of the island and use surf. You should pass the ember spa but keep going north past that you will reach mt. ember its pretty straight forward going up the mountain make sure you have strength. I recommend you save the game before attempting to capture it because if you accidently knock it out, you dont get a second chance to catch it. (i didn't save the game now i have articuno and zapdos but no moltres if anyone knows how i can get another chance to try and capture it please can you message me.. KthxBai)
If you chose Chespin, you'll find Articuno roaming in the Kalos region after defeating the Elite 4.
If you chose Fennekin, you'll find Zapdos roaming in the Kalos region after defeating the Elite 4.
If you chose Froakie, you'll find Moltres roaming in the Kalos region after defeating the Elite 4.
Once you find the Legendary Bird, either by encountering it or having someone do a trade-back, you'll have it in your Pokedex. Go into your Pokedex and look for the bird according to the starter you chose and you can find a spot blinking on its location. It'll take awhile sometimes to find it. Go to the Route the Pokedex says its in, then check again to see if it's still there. If so, apply on any kind of repel with a high level Pokemon (so the other wild Pokemon won't spawn), then walk around in the grass. The correct Legendary bird battle theme should start and that bird will appear. Yes, it will flee at the start of battle. After encountering it repeatedly in the wild, it will fly to Sea Spirit's Den, where you must travel to. It'll let you know if that's where it is flying to. You can only find one Legendary bird per game, so you would need to trade for the others from someone.
You can't find them.You can trade it from Fire Red or Leaf Green.It's the same for Ruby and Emerald.
Moltres- End of Victory Road
Zapdos- Power Plant
Articuno- Seafoam Islands
you go to the tower and get a flying horse and that will help you
Bea the game
In ruby and sapphire and emerald there is a legendary Pokemon called latios it is a dragon psychic type looks like a bird with blue on it.
you can find HO-OH (the legendary bird, found in the tin tower when you get the rainbow wing), lugia (another bird), and Entie ( i don't think I spelled that right but that is the legendary dog that you can find)
Have a ruby or another sapphire trade you a legendary!
There are loads of legendary Pokemon in Sapphire, but if you mean the main one, Kyrogue, then it is the Underwater Cavern.
it is the main legendary in sapphire
If you're talking about the legendary Pokemon Articuno, you have to trade it from FireRed or LeafGreen. If you're talking about Delibird, you have to trade it from FireRed.
the Sapphire and ruby plates in leaf green are two plates that you have to give to celio to be able to find one of the three legendary dogs.
a humming bird with a blue chin and a sapphire i its anus
There is Kyogre, Groundon,Raquaza,Latios,Latias,Deoxys,Mew,Regirock,Regiice,Registeel,Ho-oh,lugia,and jirachi. Those are all the legendary pokemons you can find in Pokemon ruby,sapphire,and emerald
Magikarp
train your legendary bird to level 67-100 LATIAS OR LATIOS go to mossdeep city and talk to the rocket guy which will send you to the moon jirachi will be there