Dong Lei / Forest wagtail (Dendronanthus indicus) amongst leaf litter. Simao, Pu'er Prefecture, Yunnan Province, China

Dong Lei / Forest wagtail (Dendronanthus indicus) on sand. Simao, Pu'er Prefecture, Yunnan Province, China

Kerstin Hinze / Grey wagtail (Motacilla cinerea) preening, Bavarian Forest National Park, Germany, April.

David Tipling / Grey wagtail (Motacilla cinerea) female at woodland pool North Norfolk, England, UK. January

Marie Read / Ovenbird (Seiurus aurocapillus) bringing nest material to its nest on the forest floor, Ithacs, NY, USA

Marie Read / Ovenbird (Seiurus aurocapillus) bringing nest material to its nest on the forest floor, Ithacs, NY, USA

Marie Read / Ovenbird (Seiurus aurocapilla), male singing in spring, New York, USA

Marie Read / Ovenbird (Seiurus aurocapilla), male singing in spring, New York, USA

Marie Read / Ovenbird (Seiurus aurocapilla), adult male in spring, New York, USA

Staffan Widstrand / Grey wagtail (Motacilla cinerea) foraging in leaf litter in forest, near Namur, Belgium. November.

Staffan Widstrand / Grey wagtail (Motacilla cinerea) walking through wet leaf litter in forest, near Namur, Belgium. November.

Oscar Dewhurst / Grey wagtail (Motacilla cinerea) male perched on a low-hanging branch, Forest of Dean, Gloucestershire, England, UK. March