Electrostatic latent image developing toner and toner external additive

An electrostatic latent image developing toner comprising a plurality of toner particles each including a toner mother particle and an external additive attached to a surface of the toner mother particle, wherein

• the external additive includes a plurality of resin particles each containing first temperature responsive polymer domains and second temperature responsive polymer domains,
• the second temperature responsive polymer domains have a lower critical solution temperature higher than that of the first temperature responsive polymer domains,
• the first temperature responsive polymer domains contain a polymer of monomers including acrylamide having an acetyl group at a position of a nitrogen atom and methacrylamide having an acetyl group at a position of a nitrogen atom,
• the second temperature responsive polymer domains contain a polymer of monomers including (meth)acrylamide having a straight chain alkyl group at a position of a nitrogen atom and (meth)acrylamide having a branched alkyl group at a position of a nitrogen atom, or a polymer of monomers including (meth)acrylamide having a cyclic ether group at a position of a nitrogen atom.