Bird Sudoku Level 225 Hint
Look for perches that share long open diagonals. If no blocker sits between two possible birds, those placements cannot both be used.
Bird Sudoku Level 225 Strategy
Expert Level 225 uses a 10x10 board with 41 perch cells, 11 blockers, and 10 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 225 Solution
Bird positions in the solution: R1C1, R1C6, R2C4, R2C6, R2C8, R4C5, R4C6, R4C7, R6C2, R7C5, R8C9, R9C5, R10C5, R10C10.