A bird — winged, feathered animals that fly (from small songbirds to eagles).
朝、公園でいろいろな鳥の声を聞いた。
In the morning I heard various birds singing in the park.
あの鳥は羽がとてもきれいだね。
That bird has very beautiful feathers, doesn't it?
鳥類（ちょうるい）の研究は生態学で重要な分野だ。
Ornithology (study of birds) is an important field in ecology.
高い木の上に鳥が巣を作っている。
A bird has built a nest high up in the tree.
Bird meat — especially chicken or fowl used as food (often referring specifically to chicken).
今日は鳥のから揚げを作った。みんなで分けよう。
I made fried chicken today. Let's share it with everyone.
祖母は若い頃、鳥をさばくのが上手だったと言っていた。
My grandmother said she used to be good at dressing poultry when she was young.