Tag Archives: starling

Bird nerd part 6: four years of garden bird data

I now have four years worth of data about the birds that visit my garden, so I thought now would be a good time to look at the latest stats, and how they compare to previous years.

In the year from June 2013 to May 2014 I was able to keep records on 38 days. On average I saw 15 individual birds of 7 species per day, although that varied a lot by month. November was the best month for bird watching, with an average of 29 individuals from 8 species per day,  while July was the quietest month, with only 10 birds of 4 species per day. The highest number of species seen per day was only 10, which is down from 13 last year.

Woodpigeon in the snow
Woodpigeon in the snow

The most regular visitors were house sparrows and woodpigeons, with at least one of each seen on every observation day. The most numerous visitors were house sparrows, with an average of 4.6 seen per day. They were followed by starlings, with an average of 2.8, woodpigeons (2.3) and blackbirds (1.4).

Young starlings
Young starlings

How does this compare to previous years?

Average total number and total types of birds seen per observation day, 2010-2014
Average total number and total types of birds seen per observation day, 2010-2014

Well, the overall average number of birds and number of species is pretty similar. But there have been some winners and losers in the last few years, as the bar graph shows.

Average number of individual birds seen per observation, 2010-2014, by species
Average number of individual birds seen per observation, 2010-2014, by species

Winners

Male house sparrow on seed feeder
Hungry house sparrow
  • male blackbird on lawn
    Male blackbird on lawn

    House sparrows (from an average of 1.7 to 4.6 per day)

  • Dunnocks – the average number seen per day in the last year is roughly double that of 2010-11
  • Woodpigeon numbers have also doubled since 2010-11
  • Blackbirds – increased from 0.9 last year to 1.4
  • Magpies – slight increase

Losers

  • Bluetit gathering nesting material
    Bluetit gathering bits of twine to use as nest material
    Robin in the snow
    Robin in the snow

    Bluetits – these used to be some of the most regular visitors to the garden, but are now seen much less frequently

  • Jackdaws
  • Robins – the average number of robins seen has halved in the last year.

If you’re interested in how these figures compare to national observations, read this post on the Big Garden Birdwatch results.

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Bird Nerd part 5: Big Garden Birdwatch 2014 results

Last week the RSPB released the results of the 2014 Great British bird watch. Once again house sparrows topped the list, with an average of 3.8 seen per garden.

The survey was carried out by almost half a million volunteers  across the UK. It involved watching a garden or park for an hour during one weekend in January, and recording the maximum number of birds of each species seen at one time.
So how do the results compare to the average number of birds I saw in my garden this January? The table below shows the mean number of birds observed per site in the UK as a whole, Surrey, and my garden. As you can see, the results are pretty similar.
House sparrows also topped my list. Unlike the rest of Surrey and the UK, I didn’t see any goldfinches. Dunnocks did make it onto my list though.
Top 10 bird species seen: Big Garden Birdwatch 2014 and my garden
Top 10 bird species seen: Big Garden Birdwatch 2014 and my garden
But how does this compare to previous years? Compared to last year there has not been a huge amount of change in the average numbers of birds seen for the top 10 species nationally. For my garden, there has been a drop in the number of starlings, and smaller drops in the numbers of several other birds, but that may be down to the mild winter meaning birds don’t need to visit the feeders in my garden as much as last year.
Top 10 birds seen in my garden in January 2013 vs January 2014
Top 10 birds seen in my garden in January 2013 vs January 2014