Birdwatching involves identifying the birds in posters placed along the route and matching them with images in the puzzle to form common phrases. Combining the position of the image on the puzzle with the “heading” on the poster forms a flag semaphore letter. Reading these letters in the order of the posters yields the answer, RETWEETING
| Bird | Phrase | Heading | Image Position | Semaphore | Letter |
|---|---|---|---|---|---|
| CHICKEN | [DON’T] COUNT YOUR CHICKENS | E | W | R | R |
| DODO | DEAD AS A DODO | S | NE | E | E |
| DUCK | SITTING DUCK | NW | N | T | T |
| EAGLE | EAGLE-EYED | NE | E | W | W |
| GOOSE | [WILD] GOOSE CHASE | NE | S | E | E |
| HAWK | WATCH LIKE A HAWK | NE | S | E | E |
| LARK | HAPPY AS A LARK | N | NW | T | T |
| LOON | CRAZY AS A LOON | NW | SW | I | I |
| OWL | NIGHT OWL | SW | SE | N | N |
| SWAN | SWAN SONG | SE | S | G | G |