Now there's a something to think about . So .. I'm going to put a picture here so that you can think about that, and its possible consequences. Well, two pictures actually .... that way you will have more time to cobble together some sort of an answer .... The truth is birds tend to sleep in little chunks ... they need to be alert. They cannot risk the long, deep sleep to which we are accustomed. They will also sleep in the daytime, if they feel safe enough. And some birds will sing in the darkness. The obvious ones are nightingales, robins, thrushes etc. And some chatter in the dark ..magpies, rooks etc. So, by and large, the amount of daylight doesn't matter too much. And here's a more local observation ..... in my garden the birds don't arrive at dawn .... there's quite a time gap between first light and bird activity... sometimes up to 40 minutes. That's sorted then. Then there's the problem of lengthy migration routes. How do they get to sleep while making huge flights over the ocean. Sometimes for 24 hours plus. Well, one thing is, they are known to land on ships, sometimes in large numbers. But lacking those ships, , instead of allowing the whole brain to sleep, they can let each half of its brain ( and it's eye) to take turns to rest. Its called Unilateral Eye Closure. Time for the music now ... this'll wake you up ..... and cheer you up ... a real belter ... ..and I know you'll want to sing along with it ..... here's the "words" video ....
0 Comments
Leave a Reply. |
AuthorThat's the author up there ... I was young and sprightly then. Archives
October 2022
|