BirdBox 2016: sexing blue tits

In England, if you put up a bird box with a small entrance hole, the most likely species to make use of it is the blue tit.

So how do you tell male from female? Chances are you won't be able to.

But blue tits don't seem to have a problem picking a mate of the opposite sex. How do they do that?

My Camray is choking

Our Camray central heating boiler developed a fault about 18 months ago.

Despite our boilerman spending a few hours trying to fix it earlier this year, the annoying little problem has persisted.

However, it looks like my efforts last Friday afternoon may finally have made the boiler behave itself.

GPS Data Visualisation

I must admit that I haven't used my Garmin eTrex 10 GPS that much this year.

Now that the weather has improved, we tend to take our Pentax cameras out when wondering around this green and pleasant land. So have little time to fiddle with a gps, entering waypoints, looking for geochaches or whatever.

However, even with the eTrex just turned on, it records data every 10 seconds, including latitude, longitude and elevation.