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The woodpeckers belong to the family Picidae and the order Piciformes.

These birds are one amongst the eight birds falling under the same family and order. Many species are threatened and endangered due to various reasons like habitat loss or habitat fragmentation.

Two species of woodpecker like the Ivory-billed Woodpecker and the Imperial Woodpecker have been categorized as extinct for about 30 years. The quick classification of this Wood pecker is given below:

 Kingdom   Animalia 
 Phylum   Chordata 
 Class   Aves 
 Subclass   Neornithes 
 Order   Piciformes 
 Family   Picidae 

Physical Characteristics:

The Bar-breasted Piculet is the smallest woodpecker weighing 7 g and 8 cm (3– inches) tall. The Great Slaty Woodpecker is considered as the largest woodpecker weighing about 450 g (1 lb) and 50 cm (20 inches) since the two species namely Imperial woodpecker and Ivory-billed woodpecker which are larger than Great slaty woodpecker have gone extinct. The Imperial Woodpecker is at an average of 58 cm (23 inches) tall and weighing about 600 g (1.3 lb). The Ivory-billed Woodpecker weighs about 500 g (1.1 lb) and 50 cm (20 inches) tall.

Many number of species exhibit sexual dimorphism in size, weight and bill length. In the woodpeckers that show sexual dimorphism it is usually the males that are larger. Most wood pecker species possess white, red, black, brown, and green colored plumage. Many woodpecker species render patches of red and yellow on their heads and bellies, and these bright areas are important to aid them in signaling.

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