Tomasz Zawadzki/ BIA / Great Reed-Warbler (Acrocephalus arundinaceus) calling, Poland

Brian Bevan / Pair of Reed warblers (Acrocephalus scirpaceus) feeding young at nest, Bedfordshire, England, UK, July.

Ingo Arndt / Reed Warbler (Acrocephalus scirpaceus) nest in Senckenberg Natural Hystory Collection Dresden, Germany.

Bence Mate / Little bittern (Ixobrychus minutus) watching Great warbler (Acrocephalus arundinaceus) with prey, Lake Csaj, Kiskunsagi National Park, Hungary.

Bence Mate / Great reed warbler (Acrocephalus arundinaceus) taking fish from water, Hungary, June.

Bence Mate / Great reed warbler (Acrocephalus arundinaceus) feeding Cuckoo chick (Cuculus canorus) Pusztaszer, Kiskunsagi National Park, Hungary, June.

Loic Poidevin / Aquatic warbler (Acrocephalus schoenobaenus) Breton Marsh, Vendee, France, May.

Staffan Widstrand / Aquatic warbler (Acrocephalus paludicola) Nemunas River Delta, Lithuania. May. Vulnerable species species.

David Tipling / 2020VISION / Reed warbler (Acrocephalus scirpaceus) with twelve day old Cuckoo (Cuculus canorus) chick at nest, Norfolk, England, UK, May

Markus Varesvuo / Great Reed Warbler (Acrocephalus arundinaceus) singing in reed bed. Estonia. June

Bence Mate / Great reed warbler (Arcocephalus arundinaceus) chick begging for food, with bokeh affect from water, Pusztaszer, Hungary, June.

Bence Mate / Common cuckoo chick (Cuculus canorus) begging for food from Great reed warbler (Acrocephalus arundinaceus) foster parent, Pusztaszer, Kiskunsagi National Park, Hungary