Half the block is one large triangle; the other half is a stair-step of six small triangles, all pointing the same way like a flock in flight.
Sew the small triangles and half-square triangles into diagonal rows to make one pieced half, then join it to the large triangle.
Free quilt patterns made from the Birds in the Air block. Open one to make it your own in QuiltLab.
A leaf on the diagonal of a nine patch: three solid leaf squares, four half-square-triangle points along the top and left, a plain background corner, and a narrow diagonal stem in the opposite corner.
A nine patch with half-square-triangle corners and two-strip side units, the dark halves turned toward a light centre square so they form a square frame with pointed corners.
A nine patch split corner to corner: three half-square triangles run along one diagonal, with light squares on one side and dark squares on the other.
Four patches in the corners and centre, all turned the same way so their dark squares make a diagonal chain, with half-square triangles on the sides whose seams run parallel to the chain.
A nine patch with half-square-triangle corners whose dark halves point in to a dark centre square, making a dark X on light side squares.
A nine patch with plain corners, a centre square, and four half-square-triangle side units turned the same way round so the star points spin like a pinwheel.
Open Birds in the Air in QuiltLab's block editor and try your fabrics and colors before you cut.
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