Bird Sudoku Level 51 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 51 Strategy
Medium Level 51 uses a 8x8 board with 19 perch cells, 8 blockers, and 6 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 51 Solution
Bird positions in the solution: R1C5, R2C3, R2C8, R3C6, R4C4, R7C2, R8C2, R8C7.