A bellbird, one of New Zealand's most melodious native songbirds, on Tiritiri Matangi sanctuary island, Hauraki Gulf, North Island, New Zealand, Pacific

Male Lowland frog swimming in a pond, France

Toad singing on bank, La Ruvubu NP Burundi

Male Lesser Whitethroat singing at spring, GB

Portrait of male Lowland frog in a pond, France

Common Cranes singing, Spain

Large Grey Babbler singing on a branch, Rajasthan India

White crowned sparrow on a branch, Denali NP Alaska

Green frog singing on lily leaf yellow, France

Bluethroat male singing on a rock, Spain

wren (Troglodytes troglodytes) displaying amongst bluebell (Hyacinthoides non-scripta, England

Wren (Troglodytes troglodytes) displaying amongst bluebell (Hyacinthoides non-scripta), England

wren (Troglodytes troglodytes) displaying amongst bluebell (Hyacinthoides non-scripta), England

Western Yellow Wagtail (Motacilla flava dombrowskii) male singing defending his territory, May, Romania

Song of the ash cranes (Grus grus) at dawn on a beach of the Loire, the cranes wake up and will not trade to fly away at sunrise, Loire Valley, France

Cape Sugarbird (Promerops cafer), calling in territorial display, Western Cape, South Africa, July

Red-winged Blackbird (Agelaius phoeniceus) male singing on a cattail in a marsh, Saguenay lac St Jean region, Quebec, Canada

Western Yellow Wagtail (Motacilla flava flavissima) male at its singing post in spring

Long-tailed Meadowlark male, Torres del Paine NP Chile

Bluethroat male singing on a rock, Spain

Blue throat (Luscinia svecica) male singing in the mid-mountain piornal, Sierra de Gredos, Avila, Spain