Things are happening fast on the frog spawn front! The idea to take a picture every 7 days wasn’t a good one, they are developing at a rate of knots. It’s now day 5 and I’m posting two pictures taken this morning. The first shows the eggs which are left and are unlikely to hatch, note all the little bodies on the floor, the mortality rate appears to be pretty high. I did a google on this and came up with www.froglife.org where it says “An often quoted statistic says that in a frogspawn blob of, say one thousand eggs, only three or four will make it from being eggs, through to tadpoles, through metamorphosis and finally to adulthood. Where competition between individual frogs is high, this number may be lower still”.

The second picture shows a couple of the hatched and healthy tadpoles.

PS I’ve just noticed that a visitor arrived here having typed ‘spotting frogspawn 2009’ into google.co.uk This site gets the top postion on this search term :-)
Thanks, Jeff. Done the water change and kept only 6 tadpoles in the vase. All else tipped back into the pond. Let’s see how it goes.