Bird Sudoku Level 204 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 204 Strategy
Expert Level 204 uses a 9x9 board with 38 perch cells, 10 blockers, and 8 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 204 Solution
Bird positions in the solution: R1C5, R1C6, R2C2, R3C5, R4C1, R5C6, R5C8, R6C1, R8C1, R8C7, R9C1, R9C5, R9C9.