Mike Read / Lower case letter d made with Japanese maple (Acer palmatum) leaves in autumn.

Mike Read / Lower case letter c made with Japanese maple (Acer palmatum) leaves in autumn.

Mike Read / Capital letter C made with Japanese maple (Acer palmatum) leaves in autumn.

Mike Read / Lower case letter b made with Japanese maple (Acer palmatum) leaves in autumn.

Mike Read / Lower case letter a made with Japanese maple (Acer palmatum) leaves in autumn.

Mike Read / Capital letter B made with Japanese maple (Acer palmatum) leaves in autumn.

Mike Read / Capital letter A made with Japanese maple (Acer palmatum) leaves in autumn.

Roland Seitre / Letter-winged kite (Elanus scriptus) perched on branch, Bedourie, Queensland, Australia.

Roland Seitre / Letter-winged kite (Elanus scriptus) in flight, Bedourie, Queensland, Australia.

Roland Seitre / Letter-winged kite (Elanus scriptus) hovering, Bedourie, Queensland, Australia.

Roland Seitre / Letter-winged kite (Elanus scriptus) in flight, Bedourie, Queensland, Australia.

Franco Banfi / Royal Mail post box inside the former British Base A, now a museum and post office at Port Lockroy, Goudier Island, Antarctic Peninsula, Antarctica.

Roland Seitre / Letter-winged Kite (Elanus scriptus), Australia

Martin Willis / Letter-winged Kite (Elanus scriptus), Queensland, Australia

Pal Hermansen / Mailbox beside bare trees. Akershus, Viken, Norway. April.

Pal Hermansen / Mailbox between bare trees. Akershus, Viken, Norway. April.

Doug Gimesy / Burnt out letter box on the Great Alpine Road which was burnt during the November / December 2019 fires. Great Alpine Road, Sarsfield, Victoria, Australia January, 2020. Editorial use only.