24 April 2015

Same nest, different tenants - squatter's rights for birds!



Everyone know it’s good to recycle or if possible re-use, but it’s not just us that does this.Two summers ago we noticed Swallows taking a great deal of interest in the toilet block at the volunteer centre here at High Wray. We always keep the door shut, to stop them flying in and getting stuck, but in this instance they were interested in the alcove above the door – an ideal nesting spot it would appear. Over the course of a couple of weeks we watched the nests build up, with both adults bringing in mud and plant material to make a lovely firm construction.

Soon after completion we were delighted to spot the female sat on the nest. We were worried at first that she’d be put off by people heading in and out of the loo, but she’d briefly exit the nest whenever anyone passed before quickly returning. A couple of weeks later we noticed she was exiting the nest a little more often and spotted tiny fluffly feathers poking out over the rim of the nest – they’d hatched!


Young and virtually featherless, the young not long hatched
It took about another 3 weeks for them to steadily grow to the point where they were hanging out over the sides and it seemed a wonder they didn’t force each other out of the nest! Shortly after that, we checked one morning to find they’d all gone (without so much as a thank you).

Shove over! The considerably bigger young almost ready to go

The next year we hoped they would return as Swallows will often repair and re-use old nests, but were disappointed to see no sign of action. By the end of the summer the nest above the gents loo door was starting to look very run down, with the ladies one holding together much better.

New tenants move in!

So we had our fingers crossed for this year but it looks like someone beat the swallows to it. It appears that a Wren has decided the ‘ladies  nest’ would make a perfect base for its own construction and has built an exquisite (and very snug looking) extra layer on top of the original base. It looks like it had a go at the ‘gents nest’ as well, judging by the tatters of moss poked into some of the holes, but obviously agreed with us on the state of it and must have given it up as too much hard work.

The 'gents nest' - not sure about that .....

Much better! The 'Ladies nest' with cosy adaptation

We’re not sure if this adapted nest has ended up being chosen by the female Wren (males normally build several nests, from which the females chose their favourite), but we’ll keep an eye on it over the coming weeks. One things for sure, with the swallows having just reappeared on the scene here (see last week’s entry on migration) they’re likely to get a big surprise if they decide to return to this particular site!

By Rob Clarke, High Wray Basecamp community ranger

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