House Sparrows and Collared Doves

OK I still have not sorted out the plug ins to get Xeno Canto embedded but my thoughts on House Sparrows.  They are brief so this 24 sec extract may be longer than it takes to read this.

http://www.xeno-canto.org/48066/embed?simple=1

I do not have enough data to prove these views but Tratalos et al (2007) looked at 27 urban indicator species across housing types.  They show an increase in House Sparrow numbers until the most densely populated housing at which point there is a sharp decline.  This seems to be true across the tetrads I have looked in.  However, something else I have noticed again it is anecdotal is that the tetrads I have found the most House Sparrows have also been the ones with the most Collared Doves.  C- Benwell and E-Kenton Bar being good examples.  I am not saying this is cause an effect, but it was really noticeable.

The BBC claim that it is the effect of house insulation that is the problem.  House improvements may have an effect on reducing nesting spaces, but there will be a lot of interlaced factors.  Kurt showed there is not much movement between flocks in winter.  In what I have seen these flocks are unevenly distributed and centre on a hawthorn hedge, clump of ivy, privet or leylandii.  Only one of these would provide the insect food that Vincent has demonstrated that sparrow chicks need before fledging.  So food, nesting and winter flocks all become issues.

In addition our garden House Sparrow flock now seems to be down to two pairs.  We have post fledging had 20 plus which has made the crowded and exciting in equal measures.  These four birds are out-competed for seeds by 9 Greenfinches, 2 Goldfinches and 2 Chaffinches.  There are lots of complications if we want to hang onto House Sparrows.  So if you are considering planting a hedge plant Hawthorn and put up a sparrow nest box if we want to hang on to the chatter above.  Incidentally, you will notice this is not a British recording.  When was the last time you saw more than 50 House Sparrows in a flock?

Advertisements

4 thoughts on “House Sparrows and Collared Doves

  1. I managed to convince the next door neighbour to stop cutting her hedges too short a few years and she actually lets them go, to a level like myself. It’s almost impossible to guess reasonably how many House Sparrows we have (mainly in her hedge/ tree line but i haver conted over 40 in the garden feeding on a few occasions. The flock has grown nicely over the last 10 years or so and i notice at least 8/10 juvs in the garden over the spring n summer. I live in Wallsend close to the Coast Road and all the semis have gardens back n front although numbers of the front gardens here are disappearing having been converted into ” car parks”.
    I don’t get great numbers of species into the garden, a Blue Tit is an excuse for a celebration, but we do get Collared Doves regularly. Haven’t got a clue where they roost or nest and on one occasion i got very excited when i had 8 of them sitting on the wires out back. Had them 3/ 4 times.
    Love the Spuggies, as does the neighbour, and are a joy to hear as well as watch.

    Like

  2. Interesting to get us thinking about familiar birds we can take for granted. Perhaps We forget how easy it is to give them a leg up.
    Id agree with Hawthorn – even more so with a protective cloak of Ivy.
    Put Hawthorn hedge in at home 10yr ago. Pit planted, mulched & irrigated, doing great, 8′ high, 8′ wide.
    We’ve let 2 in the hedge grow up into trees & kept the rest clipped tight.
    No spuggies at planting, 30 now.
    I know 1 or 2 rural spots with 70 HouseSpug & at harvest 200’s can be found – 50+ suburban or city dwelling will surely be hard to find.
    Ps. Going back to hedges, i know colonies nesting in Hawthorn just like they did back in the 70’s.
    Cheers.

    Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s