200 DICTIONARY OF NAMES OF BRITISH BIRDS. 
impression that they were one and the same species. In 
Northumberland the name is sometimes applied to the 
Stock-Dove on account of its nesting at times on crags, 
while Swainson gives Rock Dove as an Irish name for the 
BLACK GUILLEMOT. F 
RockeEt-Dove: The STOCK-DOVE. (Gunnergate-in-Cleveland.) 
From the rocket-like flight as it leaves the ivy-clad trees 
(Nelson and Clarke). 
Rock Grouse. A name for the PTARMIGAN. 
Rock Hawk: The MERLIN. (Provincial.) From its habit 
of perching on rocks. 
RockierR: The ROCK-DOVE. Montagu gives this as a pro- 
vincial name for the species. It is also spelt “‘ Rocker.” 
Rock Lark: The ROCK-PIPIT. (Montagu.) It is a Brid- 
lington (Yorkshire) name for the species. 
Rock Lintre: The ROCK-PIPIT. (Aberdeen.) 
Rock-Martnet: The SWIFT. (Merrett.) 
Rock-OvuzEt : The RING-OUZEL. (Lancashire and Yorkshire.) 
Willughby gives it as a Derbyshire name for the same 
species. It is applied to the DIPPER at Longdendale, 
Cheshire. 
Rock-Pickon : The ROCK-DOVE. (Flamborough and Bemp- 
ton, Yorkshire.) Nelson and Clarke state that the STOCK- 
DOVE is there called Rock-Dove. 
ROCK-PIPIT [No. 72]. The name is found in Selby (1825). 
It is the Rock Lark of Montagu, the Dusky Lark of Lewin 
and Pennant, the Sea Lark of Walcott and the Sea Titling 
of Fleming. 
Rock Plover: The GREY PLOVER. (Wexford.) 
Rock SanppipER: The PURPLE SANDPIPER. (Northum- 
berland.) 
Rock Sparrow: The TREE-SPARROW. (Cheshire; and 
Halifax, Yorkshire.) 
Rock Sraruinc: The RING-OUZEL. (Roxburgh.) 
ROCK-THRUSH [No. 165]. First described and named by 
Vigors (‘‘ Zool. Jnl,” 1, p. 396). Its home is in the mountain 
ranges of South and Middle Europe, hence its name. 
Rock Trinca: The PURPLE SANDPIPER.  (Selby.) 
Rocus. A Gaelic name for the ROOK. 
Roper. A name for the GADWALL. (Swainson.) 
Ropna-Hrnten. A Cornish name for the LAPWING. 
