Bird Sudoku Level 18 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 18 Strategy
Easy Level 18 uses a 6x6 board with 11 perch cells, 3 blockers, and 6 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 18 Solution
Bird positions in the solution: R1C4, R1C5, R2C1, R3C4, R6C4.