Neurotensin Immunolabeling Relates To Sexually-Motivated Song And Other Social Behaviors In Male European Starlings. (Sturnus Vulgar'S)

•Neurotensin in VTA, LS and BNST related to sexually-motivated song.•Neurotensin in VTA, LS, PAG, and POM related to agonistic behavior.•Unique patterns of neurotensin labeling explained sexual and agonistic behaviors.•Results suggest a role for neurotensin in birdsong and other social behaviors.•Study supports idea that neuropeptides in social nuclei modulate behavior.