Thunderbird Effigies

a.Carlisle, beyond Fertility Square. Is it a Tunderbird?
b.Carlisle, Spencer Brook PArcel. More clearly a Thunderbird of the same pattern as (a) Here the left wing tip was moved by a root, moved to a likely position for the photo and then put back where it was found. Faces North.
c. Littleton, Two Brothers Trail. Faces Southwest, view Northwest.
a.  b. 

c.