Mario Suarez Porras/ BIA / Grasshopper Warbler (Locustella naevia) calling, Asturias, Spain

Dong Lei / Spotted bush-warbler (Bradypterus thoracicus) singing on branch. Jiudingshan Nature Reserve, Mao Country, Sichuan Province, China. July.

Andy Rouse / Grasshopper Warbler (Locustella naevia) male perched on branch singing. UK. March.

Andy Rouse / Grasshopper warbler (Locustella naevia) male singing in spring, UK, March.

Andy Rouse / Grasshopper Warbler (Locustella naevia) male singing in spring. UK. March.

Andy Rouse / Grasshopper Warbler (Locustella naevia) male perched on bramble branch, singing in spring. UK. March

Andy Rouse / Grasshopper Warbler (Locustella naevia) male perched on bramble, singing. UK. March.

Tomasz Zawadzki/ BIA / Savi's Warbler (Locustella luscinioides) calling, Poland

Ralph Martin/ BIA / Grasshopper Warbler (Locustella naevia), Kazakhstan

Ralph Martin/ BIA / Lanceolated Warbler (Locustella lanceolata), Russia

Ralph Martin/ BIA / Lanceolated Warbler (Locustella lanceolata), Russia

Carlos N. G. Bocos/ BIA / Spotted Bush Warbler (Locustella thoracica) male calling, Qinghai Province, China

Siddharth Damle/ BIA / Broad-tailed Grassbird (Schoenicola platyura) calling, Maharashtra, India

Markus Varesvuo / Grasshopper Warbler (Locustella naevia) singing, Finland, May. Small repro only.

Yva Momatiuk & John Eastcott / Barratt's Warbler (Bradypterus barratti) calling, Mountain Zebra National Park, South Africa

Yva Momatiuk & John Eastcott / Barratt's Warbler (Bradypterus barratti), Mountain Zebra National Park, South Africa

Christian Luebke/ BIA / Grasshopper Warbler (Locustella naevia) calling, Mecklenburg-Vorpommern, Germany

Jan Wegener/ BIA / Tawny Grassbird (Megalurus timoriensis), Queensland, Australia

Robin Chittenden / Grasshopper warbler (Locustella naevia) singing on thorn, Norfolk, England, UK, April.

Robin Chittenden / Grasshopper warbler (Locustella naevia) singing on thorn, Norfolk, England, UK, April.

Robin Chittenden / Grasshopper warbler (Locustella naevia) singing on thorn, Norfolk, England, UK, April.

Ole Jorgen Liodden / Pallas's grasshopper warbler (Locustella certhiola) perched on reed singing, Hungary, July.

David Kjaer / Grasshopper warbler (Locustella naevia) perched, Wiltshire, UK, May.

Dong Lei / Spotted bush warbler (Bradypterus thoracicus) Tangjiahe National Nature Reserve, Qingchuan county, Sichuan Province, China, August.

Dong Lei / Spotted bush warbler (Bradypterus thoracicus) Tangjiahe National Nature Reserve, Qingchuan county, Sichuan Province, China, August.

Dong Lei / Spotted bush warbler (Bradypterus thoracicus) feeding, Qingchuan county, Tangjiahe National Nature Reserve, Sichuan Province, China, August.

Siddharth Damle / Broad-tailed Grassbird (Schoenicola platyura) calling, Maharashtra, India

Hanne & Jens Eriksen / Baikal bush warbler (Locustella davidi) on ground, Thailand, February

Markus Varesvuo / Grasshopper Warbler (Locustella naevia) singing, Joensuu, Finland, May

Markus Varesvuo / Grasshopper Warbler (Locustella naevia) singing, Joensuu, Finland, May

Markus Varesvuo / Grasshopper Warbler (Locustella naevia) Joensuu, Finland, May

Markus Varesvuo / Grasshopper Warbler (Locustella naevia) Joensuu, Finland, May

Markus Varesvuo / Grasshopper Warbler (Locustella naevia) Joensuu, Finland, May

Markus Varesvuo / Grasshopper Warbler (Locustella naevia) singing, Joensuu, Finland, May

Wolfgang Brandmeier / Grasshopper Warbler (Locustella naevia) calling, Baden-Wurttemberg, Germany

Rob Drummond / Rufous Songlark (Megalurus mathewsi), Victoria, Australia

Dong Lei / Spotted Bush-Warbler (Bradypterus thoracicus) perched, Tangjiahe National Nature Reserve, Sichuan Province, China, Asia

Markus Varesvuo / Grasshopper warbler (Locustella naevia) singing, Polvijarvi, Finland, May.

Brent Stephenson / Immature Fernbird (Megalurus punctata punctata) perched in dense vegetation on the ground. Stockton Plateau, West Coast, New Zealand, April.

Brent Stephenson / Immature Fernbird (Megalurus punctata vealeae) perched in dense fern near the ground. Waipoua Forest, Northland, New Zealand, January.

Brent Stephenson / Adult Fernbird (Megalurus punctata vealeae) perched on a branch amongst vegetation, showing its distinctive ragged tail. Turangi, Volcanic Plateau, New Zealand, January.

Tui De Roy / Snares Island Fernbird (Bowdleria punctata caudata) foraging for insects in humid ground vegetation. Stations Point, Snares Island, New Zealand.

Tui De Roy / New Zealand Fernbird (Bowdleria punctata) in pakahi wetland. Okarito, Westland, South Island, New Zealand.

Chris Romeiks / Grasshopper Warbler (Locustella naevia) singing, Mecklenburg Vorpommern, Germany

Rob Drummond / Little Grassbird (Megalurus gramineus), Victoria, Australia

Ingo Waschkies / Middendorff's Grasshopper-Warbler (Locustella ochotensis), Guandu Wetlands, Taiwan

Rob Drummond / Rufous Songlark (Megalurus mathewsi), Victoria, Australia

Ralph Martin / Savi's Warbler (Locustella luscinioides), Hungary

Ralph Martin / Eurasian River Warbler (Locustella fluviatilis), Hungary

Ralph Martin / Savi's Warbler (Locustella luscinioides), Vorarlberg, Austria

Rob Drummond / Rufous Songlark (Megalurus mathewsi), Victoria, Australia

Roland Seitre / New Caledonian grass warbler (Megalurulus mariei) Poindimie, North Province, New Caledonia

Roland Seitre / New Caledonian grass warbler (Megalurulus mariei) Poindimie, North Province, New Caledonia

Duncan Usher / Grasshopper Warbler (Locustella naevia) singing, Europe

Duncan Usher / Grasshopper Warbler (Locustella naevia) singing, Europe

Tomasz Zawadzki/ BIA / Savi's Warbler (Locustella luscinioides) calling, Poland

Ralph Martin/ BIA / Pallas's Grasshopper-Warbler (Locustella certhiola), Kyrgyzstan

Ralph Martin/ BIA / Pallas's Grasshopper-Warbler (Locustella certhiola), Kyrgyzstan

Ralph Martin/ BIA / Savi's Warbler (Locustella luscinioides), Romania

Ralph Martin/ BIA / Savi's Warbler (Locustella luscinioides) calling, Baden-Wurttemberg, Germany

Mario Suarez Porras/ BIA / Grasshopper Warbler (Locustella naevia), Asturias, Spain

Biraj Sarkar/ BIA / Striated Grassbird (Megalurus palustris), West Bengal, India

Duncan Usher / Grasshopper Warbler (Locustella naevia) singing, Europe

Andy Sands / Hazel (Corylus avellana) close up of female flower with pollen grains, Hertfordshire, England, UK. February. Focus stacked.

Andy Sands / Grasshopper warbler (Locustella naevia) perched on branch with caterpillar prey in beak, returning to feed young in nest, Bedfordshire, England, UK. June.

Andy Sands / Grasshopper warbler (Locustella naevia) perched on Wild rose stem singing, Bedfordshire, England, UK. June.

Andy Sands / Grasshopper warbler (Locustella naevia) perched on Wild rose stem singing, Bedfordshire, England, UK. June.

Andy Sands / Grasshopper warbler (Locustella naevia) perched on Wild rose stem, Bedfordshire, England, UK. June.

David Tipling / Grasshopper warbler (Locustella naevia) perched on a branch, singing at dawn, Cley, North Norfolk, UK. May.

David Tipling / Grasshopper warbler (Locustella naevia) perched on a branch, singing at dawn, Cley, North Norfolk, UK. May.

Roland Seitre / Rufous songlark (Cincloramphus mathewsi /Megalurus mathewsi ) Astrelba Downs National Park, Queensland, Australia, August.

Etienne Littlefair / Spinifexbird (Megalurus carteri), male calling, Tennant Creek, Northern Territory, Australia. November.

Robin Chittenden / Grasshopper warbler (Locustella naevia) male singing, perched on branch. Norwich, Norfolk, England, UK. May.

Robin Chittenden / Grasshopper warbler (Locustella naevia) singing, perched on branch. Norwich, Norfolk, England, UK. May.

David Tipling / Grasshopper warbler (Locustella naevia) in song. Norfolk, UK, May