What 'signals' the true beginning of spring?

[pics]

Crappies so shallow their back fin is out of the water..

[AKRISONER]

I walk my dog every morning and its awesome to see the changes of seasons

 

for me it was the arrival of birds every morning it seemed a new species showed up at the park. The cardinals came first, then the sparrows, then the robins. After that rain last week the nightcrawlers were out and the robins were gorging.