9/01/2011

Swifts


Swifts are little airborne birds, expenditure the bulk of their life flying. These birds have very small legs and not at all resolve willingly on the ground, perching instead just on upright surfaces. A lot of swifts have extended swept-back wings that look like a crescent or a rebound. There are 98 classes worldwide and 6 classes which occur in Bangladesh.

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