Sunday, September 7, 2008

Calling 'out' for Lovelies

Terrible (only) 2007 picture of the Lovely Fairy Wren parent birds

How can two birds, no matter how small, hide for nine months in 100 hectares?


Ask the Lovely Fairy Wrens. Unseen by me all year (but reliably reported twice), Malurus amabilis showed up briefly today at the southwestern boundary of the wetlands. To be exact, a drabbish female carrying nesting material paused for a second on a high branch in deep shadow and launched deeper into head-high tangles of vine and emerging trees.


Forty minutes patrolling a dirt road running 10 metres away and parallel to the bird's flight yielded no sight of the (presumed) pair. No sound either. But they are so very soft of voice it is almost impossible to follow them in cover by sound alone. And they do love cover within brambly tangles.


So, bird found. Game of patience begins. Can I carefully seek the nest and find the birds before they produce, say, three young, as they did last year? (Please don't ask where the junior trio went. I have enough trouble with the sedentary parents.)


Perhaps I should 'call' the birds out? Some would and do. I don't, for reasons practical and ethical/ecological, (he said piously). I don't because I'm a hopeless mimic. Birds do appear on occasion but only to fall about laughing at the strange sounds.


On a more serious note, consider the argument against calling in relation to today's sighting.


A pair of common enough birds, but rare to an area, are building a nest. One is carrying material. From nearby comes sound of a rival bird/birds. It's a challenge? What to do? Leave it to the male? Drop material and go see? Who knows? But it's an intrusion in a way that the clumsiest birder is not.


Consider further. The shyest and rarest birds are often the target of calls. Shy and rare birds almost certainly are more than usually vulnerable to stress. Calling adds to their stress. Yes, I know, where's the evidence for this? It's here (pointing to my head).


One selection, from memory, of a New Scientist magazine about 2004. In an African national park with high conservation values birds living near tourist tracks were compared by size, weight, parasite load, breeding success and other factors to those of the same species living in unvisited areas. The distant birds rated about 7 per cent fitter. It seems even mild disturbance (stress) does harm.


Wider implications are obvious. 'We always hurt the things we love' springs to mind. Perhaps a bit extreme. But being aware of potential for damage should lead to considered and sensible compromises. (Oops, too many long words bespeaks a soapbox. Time to hop off!)

10 comments:

Mosura said...

(Pictures Aunty Jack calling his little lovlies. )

I'd love to see one, especially the female.

Tyto Tony said...

Kiwis don't get Aunty Jack. We're more Fred Daggers. It's crude Vegemite v smooth Marmite.

Did you like the weevil pun in Master and Commander?

Mosura said...

Ah... the lesser of two weevils. Coincidentally, just yesterday I said to my wife that I'd like to watch that movie again.

The word verification now is hpcaakk. HP sauce I like but both Vegemite and Marmite are caakk.

mick said...

Good luck and lots of patience!

Tyto Tony said...

HP sauce indeed from a porridger. V & M precious sludge from vinegar plants.

Patience aplenty, have I.

geoff from barham said...

Hi tony,
The day I spent with you we dipped on the rufous songlark (which i didn't mind - I've seen them before) but I would've enjoyed finding these lovelies. They sound unhelpfully elusive.
I got 128 on my list for NQ, which pleased me very much. About half a dozen were first time life sightings.
Geoff from Barham

geoff from barham said...

Hi Tony,
The day I spent with you, we dipped on the rufous songlark (which I didn't mind) and also these lovelies which I rue. Never mind, my time in NQ netted 128 species, half a dozen of which were first time life sightings. BTW, I picked up a rufous-throated honeyeater at the Townsville Common while waiting for my airplane on Saturday,

Tyto Tony said...

Gidday Geoff,

So far you've still missed only half the Lovelies. Let you know when I find male.

BTW, you've put in a dashboard stat link, not your blog link.

Cheers

Boobook said...

Hi Tony
100 hectares is BIG. I'm not surprised you've missed seeing the little beauties.

Tyto Tony said...

You're right, boobook, but much is water, bulrush or long grass. Would be easier but small burn alongside wren area has been rained off for fifth year!