Insects on dandelions & New birds of the season

I biked to school today to print off some documents.  Afterwards I went behind the office building to do some photography. 

Found two of these Ragweed Leaf Beetles (Zygogramma suturalis) scurrying away from me or playing dead.

Found some egg shells on the ground.  Looks like robin eggs to me.

Sweat bee in dandelions.

A Pink-spotted Lady Beetle (Coleomegilla maculata).  It feels strange seeing an oblong-shaped lady beetle.

A green and metallic small bee.  It looks like a Agapostemon sp. to me.

On the way home, I saw two new birds of the year - Yellow Warbler and Grey Catbird. Spring migration is definitely in full-swing now.

Cutie YEWA (Setophaga petechia)

GRCA (Dumetella carolinensis) singing its complex song.