A Bird? A Plane?

It’s not a bird. It could be a plane or a nuclear power plant’s cooling tower. Actually, It is the Glass Museum in Tacoma, WA. There are lots of overcast days in the Pacific Northwest. It is great for photographing the sky as long as there are some clouds for texture. No blue skies while I was there. No need to use the ND4 gradual neutral density filter to give the sky drama. The dark brooding clouds did just that. The museum is an interesting structure that is basically an inverted, off-axis cone. The wing-like structure is the cover for a walkway.