moth in the family Geometridae

moth in the family Geometridae

5812 Good day.  I found this moth clinging to my backdoor and have no idea what kind of moth it is.  I live in Calgary Alberta.  Can you help?

This is a moth in the family Geometridae. Their larvae often are called inchworms, measuring worms, loopers, etc. because of their peculiar method of locomotion see http://preview.tinyurl.com/jukyqtu for a video clip.  Ed Saugstad, retired entomologist; Sinks Grove, WV.