In Pictures: Tech logos - the stories behind the designs

Twitter: A Blue Bird Facelift

Twitter gave its famous blue bird a facelift earlier this month. The new bird is crafted from overlapping circles to reflect how social networks, interests and ideas connect and intersect, says Doug Bowman, creative director at Twitter.

Yamaguma's take: "To the casual eye, there's not much difference between the old bird and the new bird. But the designers cleaned up the design with an eye towards proportion and balance. The old bird's head seemed a little too big, and the style gave it a more cartoonish feel. With the slightly uplifted angle, [the new bird] now has a sense of taking flight."