Forest sounds are bewitching and intriguing, from dripping moss to snuffling bear. But any summer visitor to Bartlett Cove can’t miss the deep “whoof, whoof, whoof” of a Blue Grouse 'hooter'. It’s easy to spend an hour searching for this cryptic fellow and finally catch a glimpse of him puffing up and hooting his heart out – warning other males to stay off his turf and charming females into his territory. Photographer: Emily Mount