Are there any seeded animals on Level 171?

No. The first decoded frame has no seeded animal and no opening white X; all eight animals are placed during the recorded route.

Which cells are the Level 171 red mistakes?

The red failed probes are r7c3 in the blue territory and r7c5 in the yellow territory.

The eighth animal is placed at r3c2 in the purple territory, completing Amazing with one heart remaining.

Zoodoku level guide

expert 8 colors

Zoodoku Level 171 is an unseeded 8x8 animal board; follow r8c3, r7c6, r6c1, r5c4, r2c8, r1c5, r4c7, and r3c2 while avoiding red r7c3 and r7c5.

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Place the first animal at r8c3 in the blue territory; this starts the visible white X propagation.
Place the second animal at r7c6 in the yellow territory.
Place the third animal at r6c1 in the brown territory.
Place the fourth animal at r5c4 in the pink territory.
Place the fifth animal at r2c8 in the isolated light-blue territory.
Place the sixth animal at r1c5 in the mauve territory.
Place the seventh animal at r4c7 in the right-side green territory.
Finish with the eighth animal at r3c2 in the broad purple territory, then confirm Amazing.

Colors in this level:

Blue, Yellow, Brown, Pink, Light-blue, Mauve, Green, Purple

Do not tap r7c3: the source records it as a red failed blue probe before the accepted r8c3 route target.
Do not tap r7c5: the source records it as a red failed yellow probe before the accepted r7c6 route target.

Start with blue r8c3, then take yellow r7c6, brown r6c1, and pink r5c4; keep red r7c3 and r7c5 out of the route.
After isolated light-blue r2c8, preserve the verified close mauve r1c5, green r4c7, and purple r3c2.

Board notes 5 details

Layout: The 8x8 opening has purple across the upper-left, mauve at the top center, green on the right, pink through the middle, brown/blue/yellow along the lower-left, and an isolated light-blue r2c8 cell.
Goal: Place eight animals in the verified source order r8c3, r7c6, r6c1, r5c4, r2c8, r1c5, r4c7, and r3c2, using each territory once.
Opening: The first decoded frame has no seeded animal and no opening X. The first accepted r8c3 placement starts white X propagation; the verified close is r1c5, r4c7, then r3c2.
Danger Zone: Red r7c3 is a failed blue probe and red r7c5 is a failed yellow probe; use r8c3 and r7c6 instead. Neither red mark is a propagated white X.
Mechanics: This is an unseeded eight-animal 8x8 board with two visible red probes; the final capture shows Amazing, eight animals, and one heart remaining in the HUD.

Are there any seeded animals on Level 171?
No. The first decoded frame has no seeded animal and no opening white X; all eight animals are placed during the recorded route.
Which cells are the Level 171 red mistakes?
The red failed probes are r7c3 in the blue territory and r7c5 in the yellow territory.
What is the final Level 171 placement?
The eighth animal is placed at r3c2 in the purple territory, completing Amazing with one heart remaining.