Bird Sudoku Level 167 Hint
Pick a row, column, or habitat with a low remaining count, then check which of its perch cells are blocked by open diagonal flight lines.
Bird Sudoku Level 167 Strategy
Hard Level 167 uses a 9x9 board with 29 perch cells, 9 blockers, and 6 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 167 Solution
Bird positions in the solution: R1C4, R2C4, R2C6, R2C7, R4C3, R5C1, R7C2, R8C8, R8C9, R9C2, R9C3.