For the islands in the Bismarck Archipelago see Admiralty Islands
The Admiralty Group of islets consists of eight rocky outcrops within 2 km of the north of Lord Howe Island: Soldier’s Cap, Sugarloaf, Noddy, South Island, Tenth of June, North Rock, Flat Rock and Roach Island. Roach Island is the largest being about 800 m long and 86 m high with a much-photographed 15 m tall tunnel at its northern end. The basalt lava flows are crossed by many dikes. The vegetation consists of grasses, sedges and a few bushes.[1]
These islets are noted for the nesting populations of seabirds in spring and summer in greater numbers than anywhere else on Lord Howe Island, mainly Sooty terns, Masked boobys and Brown noddys.[1]
Boat trips take visitors to Roach Island for a bird colony experience.[1]