Today was the second (and concluding) part of the Friends of Adel Woods annual nest box survey and Spring clean. Yesterday (in part 1) we started by surveying the nest boxes to the north of Crag Lane and spent the afternoon surveying the nest boxes on the Meanwood Valley Trail from the picnic area down to just short of Adel Pond.
This was another day which defied the weather forecast and turned out to be a lovely harbinger of the nesting season.
We met at 10 am in Old Leo’s car park. Five Friends turned out, including two who were taking part in the nest box survey and Spring clean for the first time!
Today, our first task was to put up “Tina’s nest box”, so named because Tina gave it to us! Situated on Crag Lane, near Old Leo’s car park, it is without doubt our best nest box, being made of woodcrete, a mixture of concrete and straw. It is spacious, dry, and designed to let the inhabitants nest well back from the entrance hole, away from the reach of predators. We cleaned it out yesterday, but found it too heavy to put back. Today with the use of a “stand off” to the ladder, we were able to put it back up.
From the car park, we made our way down to the pond with our wheelbarrow, ladders and equipment and started with box 42, just to the north of the pond. This contained a blue tit nest (we know because the entrance hole is 25 mm, so too small for birds like great tits) and the presence of droppings indicated that it had been used for roosting.
Incidentally, the reason we clean out the nest boxes each year, is that the species which use our nest boxes – like blue tit, great tit, sparrow and nuthatch – do not re-use nests from previous years. This was made clear by the lockdown in January 2021 which prevented us from cleaning our nest boxes that year. When we surveyed the boxes in January 2022, most nest boxes contained two nests, one on top of the other. It is also clear why the birds evolved to make new nests each year: when we clean out the boxes, the old nests are often full of lice and mites, droppings from roosting birds, and damp, rotted moss – not a great environment for young birds.
Our next nest box was number 38, just by the bridge below the pond. This was unusual in that it seemed to contain a sparrow nest – which is made of straw – rather than a tit nest which is made of moss and fine grass. On several occasions, nuthatches have nested in this location, but not this year.
We then surveyed and cleaned out the nest boxes on the Meanwood Valley Trail from the Slabbering Baby down to Seven Arches, finishing at about 1.45 pm.
In all, we cleaned and surveyed seventeen nest boxes today. This is the overall summary:
- twelve boxes contained tit nests;
- one box contained an incomplete tit nest;
- one appeared to contain a sparrow nest, but strangely it had a small amount of moss (which is typical of a tit nest) on the top;
- two small nest boxes which we put up last year were not used, but one contained a small amount of moss;
- one of the boxes containing a tit nest had clearly been used initially by nuthatches, but it looks as though they were driven out;
- another box showed extensive work by nuthatches, but there was no nest.
I mentioned above that there was some evidence of nuthatches in the nest boxes but no nuthatch nests. In some years we have found one or two nuthatch nests. They are very distinctive for two reasons. Firstly, nuthatches seal all possible gaps in the nest box with copious amounts of mud, both on the inside and outside – and sometimes make the entrance hole smaller. Secondly, the nest is not made with moss and grass but with bark chips, so the nest box looks rather as if someone has tipped some bran flakes into it.
Nuthatches are very sleek looking birds which are the only UK bird that can climb headfirst down a tree trunk!
Friends of Adel Woods 