Signs of Spring:
Birds chirping
Birds nests
Bees emerging from hibernation (be careful they are often on the ground!)
Worm trails
Buds or flowers on trees
Daffodils (crocus, tulips etc)
Moss Spores
Animals waking up from hibernation
Warmer weather
Weeds start growing (dandelion, violets, ground ivy etc)
Insects
Robins hunting for worms
Ferns beginning to make fiddleheads
Frog spawn and tadpoles