Cliff Swallow nests

Thanks Cindy. I don't know what it's worth as research material, but I love animal architecture. I'm hoping this becomes a worldwide mission: http://www.projectnoah.org/missions/8082...

Great mission, Ava! I'm adding this and others now.

Cindy, I've started a mission, which I'm hoping they will make worldwide, but you can put this picture in it because you're within 300 miles. http://www.projectnoah.org/missions/8082...

Haha... Cliff Swallow.... I too get them last week... will post later...

wow Cindy ! Very interesting!

Heather, it was my bad that I didn't specify the size when I posted it.
Atul, thank you!

fantastic spotting definitely a swallow nest

Ashish - mud dobbers are much smaller, I think.

I forgot to mention the size. They were about 16cm across but that's a guess since they were far above me. I agree with the swallow ID. Thank you all!

Could it be cliff swallow nests??

Definitely swallows - like these: http://textless.tumblr.com/post/21741025.... :)

Maybe, but notice the bird droppings around the area

I feel its housings of Mud Daubers...!!

fairy martin not tree martin

Could be some swallows' nests. In Australia we have a related bird, called a tree martin, which builds nests similar to your spotting