Alan Murphy/ BIA / Hepatic Tanager (Piranga flava) male calling, Arizona

Nigel Cattlin / Crescent-cup liverwort (Lunularia cruciata), close up. Berkshire, England, UK. January.

Nigel Cattlin / Crescent-cup liverwort (Lunularia cruciata). Berkshire, England, UK. January.

Chris Mattison / Crescent-cup liverwort (Lunularia cruciata), Bargain Wood, Wye Valley, Monmouthshire, Wales, UK. November.

Alex Hyde / Liverwort (Lunularia) showing thallus and gemmae cups. Peak District National Park, Derbyshire, UK, September.

Nick Upton / Common liverwort (Marchantia polymorpha subsp. ruderalis) asexual gemma cups, growing on a garden path, Wiltshire, UK, July.

Nick Upton / Common liverwort (Marchantia polymorpha subsp. ruderalis) with stalked male antheridiophores and asexual gemma cups, growing on a garden path, Wiltshire, UK, July.

Alan Murphy/ BIA / Hepatic Tanager (Piranga flava) female with insect prey, Arizona

Alan Murphy/ BIA / Hepatic Tanager (Piranga flava) male, Arizona

Alan Murphy/ BIA / Hepatic Tanager (Piranga flava) male, Arizona

Alex Hyde / Endive Pellia liverwort (Pellia endiviifolia) in centre growing through Common Liverwort (Marchantia polymorpha), the latter bearing cups containing gemmae (used in asexual reproduction). Lathkill Dal...

Alan Murphy / Hepatic Tanager (Piranga flava) female, Arizona