What kind of butterfly is this?

[brphotographycanada]

Walking in the river valley in Edmonton, this little cutie was enjoying the unseasonably warm sun. My knowledge of butterflies begins and ends with Monarchs. So, I need some help. I am confident there's at least a few folks here who can help identify it.

• ILCE-7RM5
• FE 70-200mm F4 G OSS
• 200.0 mm
• ƒ/4
• 1/400 sec
• ISO 250

 

[Merlinator]

Seems to be a mourning cloak butterfly

 

[Uncle Kevriano]

We call that a Camberwell Beauty, it's a very rare migrant here in the UK.