Bird Sudoku Level 54 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 54 Strategy
Medium Level 54 uses a 8x8 board with 21 perch cells, 7 blockers, and 9 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 54 Solution
Bird positions in the solution: R1C8, R2C6, R5C1, R5C2, R5C7, R6C4, R6C7, R7C7, R8C3.