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Showing posts with label Counting Coots. Show all posts
Showing posts with label Counting Coots. Show all posts

what i will miss - part 1

Tuesday, August 24, 2010

Part 1 of how many, I don't know.  But certainly at least two. 

When I leave this patch to go here, I will miss this.


Yep, that is the view of the shopping trolley Coot nest from Friday.  Empty, no eggs or chicks visible but the adults were still knocking about (as they always are).  The nest really is enormous now, and is likely to last the winter to leave a much better base for earlier success next year. 

I would think that this is the last time that I will set eyes on this (eventually painful) scene for two reasons.  Firstly is that there is little point in going this far up the Wandle if the Coots are not nesting, and secondly the Coots are not nesting.

It has been quite a rollercoaster watching these bloody birds over the last few years, and to a certain extent they have come to represent the the blog itself (although the image that adorned the header for quite some time was from a bird that lives some 8 miles away), although qualifying that statement might be a bit tricky to be honest.  What I do know however, is that the day that I found that they had actually produced young was as high as the day was low when I found that they had all gone to the big shopping trolley in the sky.  Which might tell you something.

Anyway that's enough navel-picking-shoe-gazing-introspective nonsense for one day.  Yes I'll miss them but they bollocked my nut in for most of each year, see ya!


Patch Invasion

Monday, February 22, 2010

Not having put much stuff into the London Bird Club wiki recently, I thought I'd better.  I scrolled down to put Friday's details in (as it wasn't a bad hour by the standards round here) and amazingly it was (almost) all in there already.  But not by me!  Someone else had been in my patch, and had seen the things I had seen and put them in the wiki!  What the...

The entry read thus...

Wandle Creek/Thames: 2 m Teal, 6 Gadwall (1 f), 1 Grey Wagtail, 1 Grey Heron, 1 G C Grebe (Thames), 2 Mute Swans, 2 Canada Geese, Tufted Duck, 1 Long-tailed Tit, 7 Goldfinch, 12 Magpie making a racket, pr Great Tit, 1 f Chaffinch, 9 Ring-necked Parakeet flying over Thames.

I have to say that I'm a bit posessive about this patch.  You see this isn't one of those designated birding areas (like Brent Res) where lots of people go, and you know that you will more than likely see another birder, this is a messy conglomerate of various habitats that I can get to in a certain amount of time.  I have met one birder in four years, and that just suits me fine.  I didn't choose this patch, it chose me.  So to have seen that another birder had been in the area got all sorts of selfish emotions running around, and a fair bit of satisfaction too.  This isn't a bad bit of London to spend half an hour if you want to see birds. 

However, there was something missing from the list.  Something that only a dedicated and hard working patch birder would have noticed.

These birds...


Coots.  He didn't count the Coots.  There are five here, but what is different about these birds is that they are on the Thames, and they are not fighting.  The resident birds stay in their territiories and fight.  These birds are visiting birds.  Patch invaders.

Wandle Creek/Thames: 11 Coots....

That's better.

Coots. No really.

Thursday, May 14, 2009

Please sir, can we have another rant about coots? Oh pleeeeeeeassse??
Okay okay!. Eyes down, look in........
In a paper published in Nature in 2003 (Egg recognition and counting reduce costs of avian conspecific brood parasitism), Bruce Lyon of the University Of California postulated that Coots can count. By removing and replacing the eggs of coots with dummy eggs that resembled Coot eggs he found that Coots (albeit our american cousins) can count.
"Clutch size comparisons revealed that females combine egg recognition and counting to make clutch size decisions—by counting their own eggs, while ignoring distinctive parasitic eggs, females avoid a maladaptive clutch size reduction."

If this is the case in the US, how come some of ours are so dumb.
Ours?
Maybe it's just mine...
There have been suggestions that there could be some kind of benign intervention with the Coots on the Wandle and this has been considered. I've done a little reading and poking about. I have asked for some information (and sometimes it has been forthcoming) from fellow birders (thanks Alan). I've looked at the site to see if it is practical, with an imaginary Darwin barking in my ear about purity of gene pools and such like. However, these thoughts have to stop dear reader. And this is why...

Exhibit A


The world infamous shopping trolley Coots. Taken at the end of last week. Although they have managed to find a large pink flower to replace the Nike trainer (houseproud obviously) they have manifestly been unable to raise the height of the nest despite the suitability of the site to do so. Indeed the bird seems to be even lower in the nest site than usual. A visit yesterday found no eggs and nothing sitting.



Exhibit B


Wandle mouth mentalist. This is a bird sitting on a nest that is exposed for no more than two hours a day. Yet it continues to leap on it once exposed, grab some materials to add and then sit tight, while it's mate attacks anything that comes close. Even if it is 10 times bigger than it. About 10 minutes after this photo was taken the tide was up to it's belly.

Exhibit C



Brent Res Coot with a bloody skyscraper! Non-tidal water, with just a little bit of structure to hold on to, and the nest is proper high.

In conclusion, with the evidence supplied within, I have no option but to surmise that the Coots on the Wandle are retards.

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