Hold the home post and use that voice
A macaw is the opposite of a hidden bird: huge, brilliantly coloured, and equipped with a scream that carries across streets. In the first hour, station the person he is most bonded to at the last-seen spot, calling his name and familiar phrases and then listening in long pauses. A macaw settled in a tall tree after a scare frequently answers a familiar voice, and that reply tells you which tree to focus on. Scan high canopies, roof peaks, and tall poles — a long tail trailing below a branch and a flash of blue, red, or green against the sky are the shapes to hunt for.
Resist sending everyone off in cars. If every familiar voice leaves, a bird circling back to the sounds of home finds silence, and macaws do circle: strong fliers who have overshot in a panic often loop back toward the territory they know once the first fright fades.
Start the phone work in parallel, not afterwards
Because a macaw can cover distance when he does decide to travel, the alert network cannot wait until the local search fails. While one person calls and listens, a second person should, within the first hour, phone avian vets, shelters, bird rescues, and local animal control with a precise description, and post to community and lost-parrot groups with a photo, the time he left, and the direction he flew. A bird this conspicuous generates sightings — people notice a macaw in a street tree — so make sure those sightings have a number to reach.
Give every contact the same details: species, dominant colours, size, any leg band, and words he says. Ask finders and spotters not to approach or feed him toward the ground themselves; a well-meant crowd under his tree can push him into another long flight just as you arrive.
If he is spotted high, work the descent patiently
Keep one familiar voice talking calmly, show him a favourite food where he can see it, and set his cage or a familiar play stand in the open below. Macaws descend in stages and may sit for a long time at each one, testing their nerve. Do not shake branches, throw objects, or climb toward him, and keep dogs and excited onlookers well back.
If he is on a structure or tree you cannot safely work under, keep a watcher with eyes on him at all times — losing the visual is the commonest way a located macaw becomes a lost one again — and call a tree service, avian rescue, or the fire service's non-emergency line for help with height.
Log direction and sightings like a map
Write down the departure direction, every reported sighting with its time, and any answering screams and where they came from. Plotted in order, those points show whether he is holding a home range or travelling a line, and that decides whether tomorrow's effort centres on your street or several streets along his heading. Coordinating that flow of reports is far easier when helpers share one channel, which is where KinsLe's Lost Pet Alert System fits: it alerts nearby members for free, and a finder who spots him can message you directly instead of posting into a feed you might check too late.