Inking during copulation in Idiosepius hallami

Inking during copulation in Idiosepius paradoxus

Another inking during copulation in Idiosepius paradoxus

Inking for predation in Idiosepius hallami

Field observation of escape behaviour with inking in the Japanese pygmy squid (S-stop)

Field observation of escape behaviour with inking in the Japanese pygmy squid (C-change)

Failure in interspecific copulation of Apid bees

Interruption of copulation by an intruding male

Copulation in a horse fly

Copulation in Pugettia quadridens quadridens

Copulation of Japanese Grass Lizards, interrupted by another male

Copulation in the peregrine falcon Falco peregrinus

Copulation in the Spot-billed Duck, Anas poecilorhyncha

Copulation in the land snail Satsuma (Luchuhadra) amanoi

Spitting of Japanese-bitterling eggs by the bivalve Anodonta woodiana

Failed copulation in the land snail Satsuma (Luchuhadra) amanoi

Homosexual necrophilia in the Sand Martin

Homosexual necrophilia in the Sand Martin

Parent-offspring vocal exchage of Amami rabbits

Mating Behavior of Typopeltis stimpsonii in the habitat

Mating behavior in Arcuphantes iharai

Larval picking behavior inducing stomodeal trophallaxis by workers in Reticulitermes speratus

Sessenryoku ni yoru sesshokumenkan no bishou heni tokusei

Feeding of a pelican to gulls

Predatory sculpin attacks toward ink clouds released by the Japanese pygmy squid