RM2R112KM–Baltimore oriole (Icterus galbula) males fighting during spring migration, Galveston, Texas, USA.
RFEH3K6W–Blue-tailed Damselfly (Ischnura elegans), two males, Burgenland, Austria
RM2F78BW7–Flight to Egypt, Joseph, Mary, baby Jesus escape slaughter of new born males, stained glass window, Gunthorpe, Norfolk, England
RMHTTGNN–Two males on the way to the beach in Puerto Vallarta, Mexico
RMRP5B6C–Common Frog, Rana temporaria, one pair, male and female among many males waiting on frog spawn for females to arrive for spawning,
RF2A38HPC–A Young Asian Boy Thinking
RM2C65XBM–Rivals Stag beetle (Lucanus cervus) two males displaying aggressive behaviour on oak tree branch, Biosphere Reserve 'Niedersächsische Elbtalaue' / Lower Saxonian Elbe Valley, Germany
RMFH49XD–Eurasian teals / common teal (Anas crecca) two males swimming in ice-hole in pond in winter
RMEWM4WG–Males playing bowls on a Crown Bowling Green, the match was played in Queens Park, Bolton, Lancashire, Greater Manchester, England UK. photo DON TONGE
RM2D97JMX–Chimpanzee (Pan troglodytes) 2 males grooming on the ground , Kibale National Park, Uganda
RMR9FBRN–Pheasant; Phasianus colchicus Two Males Cornwall; UK
RM2GEME18–Flight to Egypt, Joseph, Mary, baby Jesus, escape slaughter of new born males, stained glass window, by Frederick Preedy, 1865, Gunthorpe, Norfolk
RMA0J6TY–Grey Seal Halichoerus grypus males fighting on North Norfolk coastal wildlife reserve
RMRP5B44–Common Frog, Rana temporaria, one pair, male and female among many males waiting on frog spawn for females to arrive for spawning,
RMKD18N6–Northern Flicker (Colaptes auratus) yellow-shafted male, Toronto, Ontario - in the east flickers are yellow-shafted with red napes and males have a black malar or moustache
RM2C65XGD–Rivals Stag beetle (Lucanus cervus) two males displaying aggressive behaviour on oak tree branch, Biosphere Reserve 'Niedersächsische Elbtalaue' / Lower Saxonian Elbe Valley, Germany
RMH3HFY7–Christmas Island red crab (Gecarcoidea natalis)
RM2D21J5J–Radiated Tortoises (Astrochelys radiata). Males, adults, rival, combative males. About to use gular, the two frontmost, plastron, laminae, to ram and
RF2C2XCGG–Multi-ethnic males holding surfboards on the beach
RMFJ6F2H–Elephant Seal (Mirounga leonina) adult males fighting Saint Andrews Bay, South Georgia
RMWH8MTP–Rufous scrub birds two males
RFDW8YJ1–Three generation males decorating gingerbread house at Christmas
RM2DEHF1F–Flight to Egypt, Joseph, Mary, baby Jesus escape slaughter of new born males, stained glass window by Frederick Preedy, 1865, Gunthorpe, Norfolk
RF2CCK4G6–Mature males hiking on mountain against cloudy sky, Bergamasque Alps, Italy
RMRP5ATG–Common Frog, Rana temporaria, many males waiting on frog spawn in breeding pond for females to arrive for spawning, February, garden pond
RM2AD2AYT–Wasp Spider, the females are much larger than the males
RM2C65XCD–Sequence 4/6 - Rivals Stag beetle (Lucanus cervus) two males displaying aggressive behaviour on oak tree branch, Biosphere Reserve 'Niedersächsische Elbtalaue' / Lower Saxonian Elbe Valley, Germany
RMH3JRD4–Christmas Island red crab (Gecarcoidea natalis)
RMFAEGE2–Two males having a game of chess which is being played outdoors in a public space
RM2D97K73–Silver-washed Fritillary (Argynnis paphia) males on oregano flowers, Vosges du Nord Regional Nature Park, France
RMKGK65Y–Mallard; Anas platyrhynchos Two; Males Fighting Cornwall; UK
RMFA7BP8–Red ant Myrmica rubra emergence in garden on a hot August day - winged males, Queens and workers. Dorset
RM2E4K8DR–Impala (Aepyceros melampus). Younger males in conflict. Head to head, horns interlocked, testing, physical, mental, determination, for dominance.
RMFBYRP5–Aerial view, Ruin males Castle in the snow, Winter, Snow, Arnsberg, Sauerland, North Rhine-Westphalia, Germany, Europe, Aerial
RMFJ6F2C–Elephant Seal (Mirounga leonina) adult males fighting Saint Andrews Bay, South Georgia
RFM5REY8–Common darter, young males, Sympetrum striolatum