affectionate agility aggressive aggression alert aware animal attentive beauty behavior biology biological beast breed cautious companion concept conceptual conservation creature curious cute domestic domesticated eco ecology endangered environment environmental fierce friend freedom group habitat harmony herd hunted innocence mammal metaphor nature natural pet relaxed relaxing species variety wild wildlife wilderness zoology anatomy anatomical bird beak calm destiny destination ecological feather free flight flap flapping float flock flutter fly flying fowl glide gliding heaven hover hovering icon iconic idyllic independent journey lonely move moving outdoor outside peace peaceful resort scavenge scavenger scene scenery silhouette single skies soar soaring solitary solitude spread summer tranquil tranquility travel wings