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ST. LOUIS (KTVI) – ‘They’re related to the tree frogs so this is how they sound, ‘Tck tck tck tck tck tck’ like little marbles hitting together,’ says Michael Dawson, the Conservation Education Liaison at the St. Louis Zoo.

Heard the one about the missing frogs?

Apparently they’re few and far between these days.

‘So there’s a worldwide decline of frogs and toads and many other species of amphibians such as salamanders and many other things,’ says Dawson.

That’s why the St. Louis Zoo is asking everyone to keep their ears open during the breeding season of February to August and take part in their Frogwatch.

They`re hoping sleuth-ful St. Louisans and mindful Missourians will become citizen scientists and start holding Mother Nature listening parties.

‘The monitoring sessions last three minutes and that`s it,’ says Dawson.  You go out and listen and some of the protocols ask that you write down the temperature and weather.’

The zoo’s website tells you what you’re listening for.

It’s easy then to log onto a computer with updates of what you heard so logs like these will be home to healthy ecosystems.

‘By going out and picking a site we’ll be able to see where the species are by shifting and moving with some of the changes with global climate change and habitat destruction, this gives us an idea of where they are,’ says Dawson.

There will be five Frogwatch trainings this spring at Broemmelsiek Park and Shaw Nature Reserve. So you can help figure out why numbers are declining around the world before there’s no frogs in a bog or a field or forest and swamps without sound ‘cause frogs and toads aren’t around.