（Two little swallows fly and build a nest），The little swallow is busy picking up mud，The little mouth keeps opening and closing，The mud chunks picked up each time are not big..，Carefully place the mud blocks under the eaves，in the sun，The feathers of the little swallow shine with blue-black luster，Each piece is like a carefully polished gem，Exudes a charming light， Nests are often found in human dwellings.，in the gaps between bridges and other buildings，Sometimes they also build nests in tree holes。The nest is mainly made of a mixture of mud and saliva，cup or disk，There are multiple chambers inside，Used for hatching eggs。The nest has a rough appearance，Color is gray or brown，It's smoother inside，The color is slightly lighter，background：White painted mud house

(teeth), verybadimagenegative_v1.3, ng_deepnegative_v1_75t, (ugly face:0.8),cross-eyed,sketches, (worst quality:2), (low quality:2), (normal quality:2), lowres, normal quality, ((monochrome)), ((grayscale)), skin spots, acnes, skin blemishes, bad anatomy, DeepNegative, facing away, tilted head, {Multiple people}, lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worstquality, low quality, normal quality, jpegartifacts, signature, watermark, username, blurry, bad feet, cropped, poorly drawn hands, poorly drawn face, mutation, deformed, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, extra fingers, fewer digits, extra limbs, extra arms,extra legs, malformed limbs, fused fingers, too many fingers, long neck, cross-eyed,mutated hands, polar lowres, bad body, bad proportions, gross proportions, text, error, missing fingers, missing arms, missing legs, extra digit, extra arms, extra leg, extra foot, ((repeating hair))