How big is a hummingbirds nest?

Answer 1

On average a Hummingbird nest will only be 1 1/2 inches in diameter.




"Hummingbird Nesting

In general, the nest building and the raising of the young is all done by the female Hummingbird. She will raise one brood per season.

On average a Hummingbird nest will only be 1 1/2 inches in diameter. They will be cup shaped and made out of plant material that's held together with spider webs. Bits of lichen can be found on the outside for camouflage and the inside will be lined with plant down."

Answer 2

Many look like a knot on a tree branch. That's how small they are and how well camouflaged they are.
On the link below when you scroll down there is a picture of a baby in a nest:
http://en.wikipedia.org/wiki/Hummingbird

Answer 3

The size of a quarter.