male eurasian tree sparrow courtship and lekking display with lifted tail and strong posture

bird animal beak wildlife branch finch nature sparrow wing twig insect flower hummingbird blackbird robin tree passer montanus male birds song singing lek lekking briding display courtship behavior attracting exhibiting desire dance dancing tail feathers beauty strength show showing presentation exhibition attentions flirtation court suit performance sexual chirping calls vocalization perch sound spring love lover cute lovely side dull wings leg eurasian lifted strong posture