Unknown caterpillar

[Belmont]

As in the title, the caterpillar is quite agressive with an orangey red hook on its rear itll swing around if its touched. Found in central Alberta, my aunt hasnt seen them here in 20 years and theres some question as to what exactly it is. Help would be appreciated

 

[JBtheExplorer]

I believe this is a Bedstraw Hawkmoth caterpillar. Very cool!

 

[Marck]

Bedstraw Hawk-moth (Hyles gallii) is a Sphinx Moth (Sphingidae), with a circumboreal distribution, being native to Europe, northern Asia, Japan, Canada, and the northern United States. Its larval foodplants include many members of the Evening-primrose Family (Onagraceae), such as Chamerion, Circaea, Clarkia, and Epilobium. In addition, there are reports of larvae consuming Birch (Betula, Betulaceae), Plantain (Plantago, Plantaginaceae), Purslane (Portulaca, Portulacaceae), Rose (Rosa, Rosaceae), Bedstraw (Galium, Rubiaceae), Willow (Salix, Salicaceae), and Grape (Vitis, Vitaceae)