Bird list for April 11th, do any other birders collect or take interest in interest rates?

I’ve been busy with my parents here again but have been trying to watch the garden as much as possible.  I’ve also been doing a lot of DIY and work on the websites I do for actual work, now ISA Season is behind us a few banks and building societies are finally increasing interest rates for cash savings, best interest rates for term deposits and instant access for the UK can now be seen here: saverscene.co.uk/savings/ (now closed as I move into gardening as a profession) and for the highest interest rates in Australia: saverscene.com.au/finance/savings/ (now closed as I move into gardening as a profession) I personally find the interest rate differences between the countries fascinating, I don’t know if it’s something with people interested in birds and collecting that find mathematical problems and things like interest rates interesting?  I know pretty much all birders I speak to collected stamps, cards or coins as a kid, many still collect things as adults, I’ve noticed Dr Who Figures, Star Wars Figures and other such things, or are obsessive list makers.  I don’t have the cash for collecting, but like to keep lists and updated pages for those sorts of things.  I like to see comparisons, graphs and charts, any other birds out there the same?

My garden bird list, and a few from just near Murrayfield, for April 11th 2013:

1. Blackbird x 2 – males fighting for territory
2. Carrion crow x 1 in garden, 3 mobbing the common buzzard.
3. Common Buzzard x 1 – getting mobbed by a crow on the edge of the western approach near Murrayfield, Edinburgh
4. Dunnock x 3
5. Magpie x 2 – not sure if it was the nesting pair I’ve seen around a bit
6. Starlings x 2 – and not the evening murmurations as usual.
7. Woodpigeon x 5