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

John Waters / Cetti's Warbler (Cettia cetti) singing in reeds at dawn, Ham Wall RSPB Reserve, Somerset Levels, England, UK, December.

Andy Sands / Dartford warbler (Sylvia undata) singing from Gorse bush, Hampshire, England, UK, May

Aflo / Bush Warbler (Cettia diphone) profile, Tokyo, Japan, January.

Richard Steel / 2020VISION / Dartford warbler (Sylvia undata) perched on gorse bush singing, Denbighshire, Wales, UK, May.

Brent Stephenson / Marquesan Reed Warbler (Acrocephalus mendanae) singing from a perch in a bush. Hatiheu, Nuku Hiva, Marquesas, French Polynesia, November.

David Kjaer / Grasshopper Warbler (Locustella naevia) singing in wild rose bush, Wiltshire, England, UK. May

David Kjaer / Grasshopper Warbler (Locustella naevia) singing in Hawthorn bush, Wiltshire, England, UK. May

Andy Sands / Garden Warbler (Sylvia borin) singing from wild Rose bush, Hertfordshire, England, UK, April

Duncan Usher / Willow Warbler (Phylloscopus trochilus) singing in rose bush, Europe

Nature Production / Japanese Bush-Warbler {Cettia diphone} singing, Nagano, Japan, June

Nature Production / Japanese Bush-Warbler {Cettia diphone} singing Miyagi, Japan, March

David Tipling / Cetti's warbler (Cettia cetti) perched on branch singing, Norfolk, England, UK. May.

David Tipling / Cetti's warbler (Cettia cetti) perched in tree singing, Kent, England, UK. April.

Ewan Flynn / Spectacled warbler (Curruca conspicillata) male, perched in bush, calling, Ponta de Sao Lourenco, Natura 2000 Site, Madeira. September.

Ewan Flynn / Spectacled warbler (Curruca conspicillata) male, perched in bush, calling, Ponta de Sao Lourenco, Natura 2000 Site, Madeira. September.

Ewan Flynn / Dartford warbler (Sylvia undata) male, perched on Gorse (Ulex sp.) bush, singing, Thursley Common, Surrey, UK. April.

Mick Jenner / Blackcap (Sylvia atricapilla) male perched in a bush and singing. The bird jumps further up the bush and then leaves the frame. River Honndu, Pany, near Abergavenny, South Wales.

David Tipling / Dartford warbler (Sylvia undata) male, in song perched in Gorse (Ulex sp.) bush, North Norfolk, UK. May.

David Tipling / Dartford warbler (Sylvia undata) male, in song perched in Gorse (Ulex sp.) bush, North Norfolk, UK. May.

David Tipling / Dartford warbler (Sylvia undata) male, in song perched in Gorse (Ulex sp.) bush, North Norfolk, UK. May.

Laurie Campbell / Male Willow warbler (Phylloscopus trochilus) perched at top of juniper bush, singing, Inverness-shire, Scotland, UK. May.

David Tipling / Cetti's warbler (Cettia ceti) Snettisham, Norfolk, autumn

Robin Chittenden / Cetti's warbler (Cettia cetti) male singing, perched in tree. Thorpe Marshes, Norwich, Norfolk, UK. April.

Mick Jenner / Dartford warbler (Sylvia undata) singing from a gorse bush, Dorset, England, UK, April.