Sleepy or hay fever,Daurian redstart,Jyoubitaki,ジョウビタキ

Do wild birds have hay fever, too? Is this Daurian redstart female sleepy or hay fever?
Spring is the season that to bring us sleepy to Japanese people.

And we talk to myself everybody know the famous Chinese poetry" 春眠不覚".

The English meaning of "春眠不覚" is that:

In spring one sleeps a sleep that knows no dawn.　

The following is the full text of this poem by孟浩然Mèng Hàorán,in689 - 740

I tried translate in English

春眠不覚暁 In spring one sleeps a sleep that knows no dawn

処処聞啼鳥 I hear singing of birds in several places

夜来風雨声 Last night there was a stormy breeze.
花落知多少Probably a lot of flowers scattered