I like frogs, (just incase you didn't notice) and I reckon they do an awesome job in the garden.
They eat all your bad bugs, but leave most predatory insects alone, they sing for you, and they have a real cool attitude that I can really relate to.
There are a few issues they are having at the moment world wide, and that is causing huge numbers of extinctions.
Global warming, introduced fungal diseases, introduced pest species like toads and cats, irresponsible farming practices, insecticide herbicide and fungicide use and the "non toxic wetting agents" that go along with it, are all big killers of frogs and their eggs.
Anyway, frogs are doomed, no doubt about it, but in the meantime we can all do our bit to save a couple of the cute buggers, and get them to give us a hand in the garden at the same time.
I set up these kiddies pools in the garden and on the balcony for many reasons. (Keeping them up high off the ground to stop the cane toads. 25inches-60cm high is plenty)
You can grow edible and medicinal water plants in them, you can attract predatory insects and native bees, and you can breed up your local frogs and send them out like a moving insecticide army to patrol your garden for you.
Cheaper and much more effective than any systemic spray, and you get a bit of good karma at the same time.
Instead of watering the garden with tap water, put the tap water in the pond and gravity feed the pond water in the garden.
All the mozzie larvae, dead decomposing leaves, algae, and frog/bird poo really helps improve the soil.
When you tap the edges of the pond the mozzies all scoot to the bottom and get syphoned out onto the garden where they die.
This actually LOWERS the mozzie numbers in your area as they are lured to breed in your kiddies pond, and then the babies are killed and used as fertilizer in your garden.
Even gives the frogs somewhere to go instead of your water tank so that means your drinking less frog shit. That can only be a good thing.
Every possible angle you look at it, its worth doing, and if every one did, maybe we could save the frogs.......
Worth a try?