Is the biggest woodpecker in Thailand. Most of its body is grey. The pharynx and the area under the neck is beige. The male’s cheek has red stripes. The pharynx and the area under the neck is pale red. The female does not have any stripe or red color.
Can be found in the North of India, Southwest of China, Southeast Asia, Greater Sunda, and Palawan Island. In Thailand, it can be found in every region.
The food is the insect, especially worm or the grub feti which digs the wood skin.
Lives both in sparse forest and dense forest. It normally can be found in a small troop of approximately 3 to 10. It seeks for the food in the big tree. It never seeks for the food on the ground. The Great Slaty Woodpecker mostly clings separately on the tree which is near each other and communicates with each other by its voice and its knocking noise. When flying, it will fly over the treetop by slowly flapping it wings. The whole troop will fly together and the leader will fly ahead of others. It stays at the height of 1,000 meters from the sea level.
This bird breeds during summer to the rainy season between March and May. It builds the nest in the hollow of the large tree which has the soft skin; for example, the Tetrameles nudiflora. The nest has 3 to 4 eggs and the egg is white. Both sexes help each other digging the hole, incubating the eggs, and feeding the chick. The incubation period is 24 to 25 days.