Loic Poidevin / Blue rock thrush (Monticola solitarius) perched on a branch, Valencia, Spain, February

Loic Poidevin / Blue rock thrush (Monticola solitarius) perched on a branch, Valencia, Spain, February

Loic Poidevin / Blue rock thrush (Monticola solitarius) perched on a branch with prey, Valencia, Spain, February

Loic Poidevin / Blue rock thrush (Monticola solitarius) perched on a branch, Valencia, Spain, February

Andres M. Dominguez / Blue rock thrush (Monticola solitarius) Spain, April.

Dong Lei / Blue whistling-thrush (Myophonus caeruleus eugenei) on mossy rock, Lijiang Laojunshan National Park, Yunnan Province, China. April.

Dong Lei / Blue whistling-thrush (Myophonus caeruleus eugenei) on mossy rock, rear view, Lijiang Laojunshan National Park, Yunnan Province, China. April.

Hanne & Jens Eriksen / Common rock thrush (Monticola saxatilis) female, perched, Oman, April.

Hanne & Jens Eriksen / Blue capped rock thrush (Monticola cinclorhynchus) male on branch, India, January

Hanne & Jens Eriksen / Blue rock thrush (Monticola solitarius) male on ground, Oman, December

Rosl Roessner / Blue Rock-Thrush (Monticola solitarius) female, Morocco

Rosl Roessner / Blue Rock-Thrush (Monticola solitarius) female, Morocco

Andres M. Dominguez / Blue Rock-Thrush (Monticola solitarius) male, Cadiz, Spain

Andres M. Dominguez / Blue Rock-Thrush (Monticola solitarius) male, Cadiz, Spain

Oscar Diez / Blue Rock-Thrush (Monticola solitarius) male, Castile-La Mancha, Spain

Andres M. Dominguez / Blue Rock-Thrush (Monticola solitarius) male, Cadiz, Spain

Andres M. Dominguez / Blue Rock-Thrush (Monticola solitarius) male, Cadiz, Spain

Andres M. Dominguez / Blue Rock-Thrush (Monticola solitarius) male, Cadiz, Spain

Fabrice Cahez / Blue Rock Thrush (Monticola solitarius) in rock. Extramadura, Spain, May.

Sandesh Kadur / Malabar whistling thrush (Myophonus horsfieldii) perched on rock, known for its human-like whistle, this bird inhabits wooded ravines in the Western Ghats, India

Florian Möllers / Blue whistling Thrush (Myophonus caeruleus) perched on rock, Zhouzhi Nature Reserve, Qinling mountains, Shaanxi, China, April

Hanne & Jens Eriksen / Blue rock thrush {Monticola solitarius} Jabel Hafeet, Al Ain, United Arab Emirates

Hanne & Jens Eriksen / Blue rock thrush {Monticola solitarius} Sall Ala, Musandam, Oman

Hanne & Jens Eriksen / Blue rock thrush {Monticola solitarius} Qatbit, Oman

Marko Matesic/ BIA / Blue Rock-Thrush (Monticola solitarius) juvenile, Primorje, Croatia

Robin Chittenden / Blue rock thrush (Monticola solitarius) carrying berry, Bon Sou, Menorca, Spain, May

Robin Chittenden / Blue rock thrush (Monticola solitarius) on piece of wood, Bon Sou, Menorca, Spain, May

Mike Read / Blue rock thrush {Monticola solitarius} perched on ruined building, Algarve, Portugal, February

Richard Flack / Sentinel rock thrush (Monticola explorator) male, perched on rock, Naude's Nek, Drakensberg Mountains, South Africa.

Richard Flack / Sentinel rock thrush (Monticola explorator) male, perched on rock looking out over dry, hilly landscape, Naude's Nek, Drakensberg Mountains, South Africa.

Richard Flack / Sentinel rock thrush (Monticola explorator) male, perched on rock, singing, Golden Gate Highlands National Park, Free State, South Africa.

Richard Flack / Cape Rock thrush (Monticola rupestris) male, perched on rock calling, Giant's Castle, Drakensberg Mountains, South Africa.

Winfried Wisniewski / Blue Rock-Thrush (Monticola solitarius) female, Valencia, Spain

Winfried Wisniewski / Blue Rock-Thrush (Monticola solitarius) male, Valencia, Spain

Winfried Wisniewski / Blue Rock-Thrush (Monticola solitarius) male, Valencia, Spain

Juan Carlos Munoz / Bluethroat (Luscinia svecica) perched on a rock in the mountains, Riano, Castilla y Leon, Spain. July.

Juan Carlos Munoz / Male Red rock thrush (Monticola saxatilis) portrait, Riano Mountains, Castilla y Leon, Spain. July.

Juan Carlos Munoz / Bluethroat (Luscinia svecica) vocalising perched on a lichen covered rock in the mountains, Castilla y Leon, Spain. July.

Ashish & Shanthi Chandola / Blue-capped rock thrush ( Monticola cinclorhynchus), Whitefield, Bangalore, India. March.

Ashish & Shanthi Chandola / Blue-capped rock thrush ( Monticola cinclorhynchus), Whitefield, Bangalore, March.