When should cyan 70 be started?

Start it only after an earlier cyan lane returns and at least one additional hole is free for lock releases.

What remains after the yellow duck body clears?

The dark top hat, cyan side fields and yellow sky band still require their late stacks.

Colony Flow! level guide

hard 8 colors

Drain the top-hat duck by opening yellow 13, cyan 1, cyan 22 and yellow 13, then protect one hole through four locks and the cyan 70 route.

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Tap yellow 13, cyan 1, cyan 22 and yellow 13, then wait for a cyan hole to return.
Alternate cyan 12/40/45 with yellow 30/43 and the first red wave, preserving one hole through each lock release.
Route dark 20 and the unlocked purple card before committing cyan 70.
Let cyan 70 run while feeding only short yellow and orange cards into returned holes.
Clear the duck body and beak, then work through late cyan, red and dark cards as the image contracts to the hat.
Finish the dark 65/35 hat routes and remaining yellow sky cards, then wait for the last ants.

Colors in this level:

Yellow, Cyan, Dark purple, Orange, Red, White, Green, Purple

Starting cyan 70 with all other holes occupied prevents the next unlocked color from entering.
Opening a second long cyan route while 70 is active starves the yellow and dark hat cards of space.

Start cyan 70 only while one additional hole remains free.
Feed short yellow and orange cards beside the long cyan stream instead of opening another 45.
Save room for each lock release; its new color must route immediately.

Board notes 5 details

Layout: A yellow duck in a tall dark-purple top hat floats on a broad cyan pool beneath yellow and red sky bands. Five holes face yellow 13, cyan 1, cyan 22 and yellow 13 above cyan 12/40/45, yellow 30/43, dark 20, four locks and a cyan 70 route.
Goal: Clear the cyan water and sky bands, then remove the duck's yellow body, orange beak, white eye and dark hat until the last brim and crown vanish.
Opening: Tap yellow 13, cyan 1, cyan 22 and yellow 13 in order, then wait for a cyan lane to return before using the fifth hole.
Danger Zone: Cyan 70 and repeated cyan 45 stacks can monopolize the tray while locks release yellow, red, purple or dark cards; the white buffer must remain available.
Mechanics: A locked endurance board surrounds a compact duck with a huge cyan field, four releases and one 70-cube water route.

When should cyan 70 be started?
Start it only after an earlier cyan lane returns and at least one additional hole is free for lock releases.
What remains after the yellow duck body clears?
The dark top hat, cyan side fields and yellow sky band still require their late stacks.