Territorial disputes of a monogamous butterflyfish

Fatal fighting of a butterflyfish

Spawning behaviour of a butterflyfish

Territorial defense of male three-spined stickleback Gasterosteus aculeatus

Intra-pair usage of a lateral or tail-up display in a monogamous butterflyfish

Territorial contest in male Chrysozephyrus smaragdinus

Grass pulling behaviours across territorial boundaries

Territorial contest in a dragonfly

Responses of oval butterflyfish to the dummies mimicking a tail-up and a normal postures.

Encountering when a male visited the territory of a female

Male three-spined stickleback chasing a female out of the territory

Maritime territorial disputes in East Asia: a comparative analysis of the South China Sea and the ...

Fight of hummingbird

Exchanging “aggressiver calls” in agonistic interaction of Kajika frog (Buergeria buergeri) :

Spawning behavior (territoriality) of Rhodeus ocellatus kurumeus, Yao, Osaka, JAPAN

Male-male fighting in a butterfly

Agonistic interaction of Kajika frog (Buergeria buergeri) 2: escalated fighting

Streaking by non-territorial male of P.aurigarius

shell fight of hermit crabs

Pair spawning by territorial male of pteragogus aurigarius

Female fighting of Dorcus rectus rectus

Male-male competition of Japanese scorpionfly

Group　spawning by non-territorial male of P.aurigarius

Male-male agonistic behavior of Carrhotus xanthogramma

Male-male fighting of northern elephant seals