Friday 29 January 2016

On Guard!

Mistle Thrush c. Shay Connolly.

Mistle Thrushes often avail of an elevated perch, from a conifer top to a high aerial or telegraph wire: to advertise their strong,far carrying and plaintive song that is noticable from January onwards.

As well as being an aggressive species in the breeding season, they also defend a feeding territory, down to one bush, sometimes for the whole of the winter.  We have one such bird on the hedgerow en route to the village: perched over a good sized Holly tree, still with berries.  Invariably, as I drive past there is a Mistle Thrush perched up on a telegraph wire, perfectly placed beside the favoured Holly tree. Any thrush species that come close to investigate the food store are chased away midst the clamour of an urgent rattling call, backed up by a swooping descent on the intruder.

Where there's fruit.. there's a Mistle Thrush ( c. David Dillon)
 It is said that in really hard weather that this defence of a tree and reliable food source is abandoned, only because the pressure of numbers from other thrushes can't be defended and better to share and get some food than none at all, when futile defence is likely to have an adverse affect on actual feeding time.

Mistle on an ornamental or Chinese Rowan (c. Peter Walsh).
  
Though audible and highly visible, Mistle Thrushes are rather scarce, and apart from early autumn roaming flocks, are seldom seen in numbers and thus far, have remained off my Garden Bird Survey list this winter, though I am hopeful of recording a territory and a nest in one of the ash trees on our boundary, before the survey is  finished at the end of February.

1 comment:

  1. That's an excellent observation on a Mistle Thrush defending a berry tree. Fascinating stuff!

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