Safira, I would advise you to read the book called macaws a complete pet owner's manual by Barrons.
First we have to talk about each Green Wing Macaw here.
If you are buying a rescue GW, you are also buying their back round and the luggage they come with. Yes, they can be screamers, they can be hands off Macaws, they can feather pluck. On the other hand, they maybe quiet, very independant, perhaps enjoy talking over screaming.
Most macaws are very vocal in the morning and late eve. This does not mean that they are screaming during these hours and if they are, they are many tips to learn to teach the Macaw not to scream and replace having to be vocal with talking instead.
I also wake up my boys in the morning with feedings approx 8:00am. So morning feeding stopped the morning calls.
In the Eve, my boys started to vocalize around 9:00pm or so, so I now remove them from their cage for 2-3 hours and this is now their play time. So, I don't deal or hear screaming birds like others do.
You also have to remember that both of my boys were purchased as baby birds that I hand raised them and this is huge. I did not purchase a bird with bad behavior issues, I teach and reward good behavior and ignore bad behavior.
I also take my boys outside for a walk with them. We explore trees, other walkers outside, children in my neighborhood who love to come up to them. I go for car drives with my boys and to petstores who allow animals, I take them to bird meeting with my bird club, all of this interaction is very good for birds and help them to be social, remain tame and at the end of our day, they just want to eat and go to sleep.
I would advise people who want a Macaw to limit themselves, don't be a bird collector or horder of birds, you are setting yourself up along with your birds to be screamers or in your own discription stated to get the others going. It would be impossible for 1 person to have a schedule like mine when they have 10-15 birds in a house hold. All of these birds are not getting the attn I give to my two boys and it is really unfair for them.
I am not trying to judge anyone who has a house full of birds.
To be honest, I have no idea how they do it or could stand hearing screaming birds all day as discribed from some members.
I would only say to them, better you then me.
So it's 7:18am now in MD. I just wanted to add my 2 cents here and have to leave you to get my day started with my boys. Best of luck to everyone. Joe