- published: 14 Aug 2014
- views: 37019
Bird migration is the regular seasonal journey undertaken by many species of birds. Bird movements include those made in response to changes in food availability, habitat, or weather. Sometimes, journeys are not termed "true migration" because they are irregular (nomadism, invasions, irruptions) or in only one direction (dispersal, movement of young away from natal area). Migration is marked by its annual seasonality.
In contrast, birds that are non-migratory are said to be resident or sedentary. Approximately 1800 of the world's 10,000 bird species are long-distance migrants.
Many bird populations migrate long distances along a flyway. The most common pattern involves flying north in the spring to breed in the temperate or Arctic summer and returning in the autumn to wintering grounds in warmer regions to the south. Of course, in the Southern Hemisphere the directions are reversed, but there is less land area in the far South to support long-distance migration.
The primary motivation for migration appears to be food; for example, some hummingbirds choose not to migrate if fed through the winter. Also, the longer days of the northern summer provide extended time for breeding birds to feed their young. This helps diurnal birds to produce larger clutches than related non-migratory species that remain in the tropics. As the days shorten in autumn, the birds return to warmer regions where the available food supply varies little with the season.
What view will be waiting for me when I cross over this endless ocean?
Will there be something I've been searching for on the next island?
I seem to be on a long trip without a rest for a long time since I left.
The sky's getting dark but I don't even know where I'll sleep today.
How far have I come from the place that you are?
Where can I go with my wings?
No matter how far I go, this violent wind doesn't seem like it will stop.
But I'll keep flying on like a bird of passage
To not forget how to fly.
This is the song that combines the piece of your dream with mine.
So I'll keep singing on untill my voice is gone
To not forget how to sing.
I wish this voice echoes in someone's broken heart.
Like the setting sun spreads all over the sky.
Will this trip never end?
Where can I go till tomorrow comes?
In time, this orange turns to darkness...
But I'll keep flying on like a bird of passage
To not forget how to fly.
The piece of your dream is shining bright in my heart.
So I will keep singing on until my voice is gone
To not forget how to sing.
I wish this voice echoes in someone's broken heart.
So I will keep singing on until my voice is gone
To not forget how to sing.
I wish this voice echoes
Like the setting sun spreads all over the sky...
このどこまでも続く海を越えたら どんな景色が僕を待っているだろう?
次にたどり着いた島に 僕の探し物はあるのかな?
長い間旅をしている気がする 飛び立ってからずっと翼を休めることもなく
空は暗くなって来てるけど 今日の寝る場所だって僕にもわからないさ
どのくらい遠くまで来たんだろう 君のいる場所から?
僕のこの翼でどこまでいけるだろう?
どれだけ進んでも 強く吹き荒れる風は止まりそうもない
でも僕は飛び続けるよ 渡り鳥のように
もう飛び方を忘れないようにね
これは君の夢のカケラと僕のカケラを合わせた歌
だから僕は歌い続けるよ この声が出なくなるまで
もう歌い方を忘れないようにね
この声が誰かの傷ついた心に響き渡ることを願う
空に夕日が滲んでいくみたいに
このたびに終わりはないのかな?
明日が来るまでにどこまで行けるだろう?
やがてオレンジは闇に変わる...
でも僕は飛び続けるよ 渡り鳥のように
もう飛び方を忘れないようにね
君の夢のカケラは僕の心の中で生きている
だから僕は歌い続けるよ この声が出なくなるまで
もう歌い方を忘れないようにね
この声が誰かの傷ついた心に響き渡ることを願う
空に夕日が滲んでいくみたいに
だから僕は歌い続けるよ この声が出なくなるまで
もう歌い方を忘れないようにね
この声が誰かの傷ついた心に響き渡ることを願う