What are these insect(?) eggs?

[orloffer]

These round, white eggs appeared on my window a couple days ago. At least, I am assuming they are eggs. Does anyone know what they are from or what they will hatch into? They are very tiny (each less than a millimetre), and there are 47 of them. Here is the best picture I could get of them through my window. They are in the bottom right corner, lined up in curiously neat columns:

In case it helps, I am located in California.

 

[Rose Quartz]

These round, white eggs appeared on my window a couple days ago. At least, I am assuming they are eggs. Does anyone know what they are from or what they will hatch into? They are very tiny (each less than a millimetre), and there are 47 of them. Here is the best picture I could get of them through my window. They are in the bottom right corner, lined up in curiously neat columns:View attachment 2336135
In case it helps, I am located in California.

Most likely butterfly eggs. ^u^

 

[JacinLarkwell]

^^ They're caterpillar eggs. I'd say monarchs but I think they have green eggs

 

[orloffer]

Thank you, RoseQuartz and JacinLarkwell! I've seen one or two butterflies around here, but not many. Do you know how long they take to hatch?

 

[JacinLarkwell]

I think it's about a week? Not sure, we don't get caterpillar eggs here. We just randomly find one munching leaves