The insomniacs and early risers among you will have noticed that as the mornings are getting lighter, so the noise produced by our energetic bird population is getting louder.
I have a love-hate relationship with the dawn chorus, depending how much sleep I’ve had during the night. If I’m well rested, then it’s like uplifting music to gently come round to. After a wakeful night, however, it’s more like an unpracticed school orchestra warming up in my garden.
Like the call of the cuckoo I mentioned last week, the arrival of the dawn chorus is another sign that winter is behind us. The chorus is predominantly made up of male birds looking for love, and those with the loudest songs quickly attract partners. The bird produces his tune from an organ called the syrinx, and a lusty syrinx draws the females like bees to pollen. His spirited birdsong saps much of his energy, and so not only does he have to be fit, but he must be an excellent hunter to ensure he has enough food to keep his strength up. So if he can be heard above the other members of the chorus, discerning females will assume that he is likely to not only father healthy chicks, but also be a reliable source of sustenance for the growing family.
The dawn chorus season lasts from late April through to early June, and once a bird has secured his lady love, he is no longer required to sing so loudly. So as the season progresses, fewer birds take part. It’s likely that you will hear the odd bird singing a lonely tune at dawn late on in the season, but sadly he’s probably been saddled with an inadequately-performing syrinx and as such, is destined to remain single and loveless.
As my dad explains in his column from 20th May 1978, there’s an order in which the birds sing the daily chorus, and more often than not it’s the blackbird who starts them off. He is one of our finest songsters and, like the bird equivalent of Gareth Malone, he leads the feathered choir melodiously towards the new day. Soon his contemporaries, such as the song thrush, the wood pigeon, the robin, the turtle dove, the pheasant, the willow-warbler, and the wren all join in.
As the sun comes up, the chorus diminishes, usually lasting from half an hour before to half an hour after sunrise. This is because that once the day has fully dawned, then the insects, seeds and nuts that the birds feed upon become easier to spot. The sounds that you hear during the day are mostly bird calls which are a type of communication, such as alerts to danger, disputes between rivals, or messages to one another.
There’s quite a difference between birdsong and bird calls. Calls are short, simple sounds, whereas songs consist of a more complicated and longer sequence of notes. There is some debate about whether birds can sing just for the sake or enjoyment of it. But when I watch a blackbird in full throttle near the top of the poplars by my house, he certainly looks to be enjoying himself.
The dawn chorus is a phenomenon that happens all over the world, and the first Sunday in May is now International Dawn Chorus Day where we are invited to get up early and appreciate one of nature’s most entertaining performances. The day came about in the 1980s when broadcaster and environmentalist Chris Bailey hosted a birthday party at 4am specifically so that his guests would enjoy the dawn chorus, and it grew from there, with 80 countries now participating. Events are organised all over the UK by bodies such as the Wildlife Trust, the RSPB and the National Trust, so that we can all learn to appreciate the wonder of such a spectacle.
As I’m writing this a few days before Sunday 6th May, I’m yet to make up my mind whether to rise early or not, as in recent days, I have already heard the dawn chorus several times thanks to a doggie guest who seems to want to make sure I don’t miss it! So, as he will have gone home by Sunday, I might just take the opportunity to grab a much needed sleep in!