Bring on the wealth and fame...
I saw two American robins in the garden yesterday and I was the first in this house to do so...this is supposed to being me good luck, wealth and fame.
The robin tends to follow the 37 °F (3 °C) isotherm north in spring and south in fall. The robin eats ground-borne insects and worms in the spring and those sources of food start to appear as the surface temperature increases.
Whatever the reason, their presence is a true sign that Spring be here.