This video from the USA says about itself:
Yellow-bellied Sapsucker drilling sap wells
Yellow-bellied Sapsuckers get their name from the grids of shallow “wells” they carve out of tree tunks, enabling them to consume both the sap that collects and insects that are also attracted. Both sexes of this woodpecker show a crimson red cap and a long white stripe on the folded wings, while males also have a red patch on the throat.
Dear Kitty. Some blog 
Pingback: American red-bellied woodpeckers, video | Dear Kitty. Some blog
Pingback: White-breasted nuthatch at nestbox | Dear Kitty. Some blog
Pingback: Great blue heron, belted kingfisher in the USA | Dear Kitty. Some blog
Pingback: Feeder songbirds and great blue heron in New York, USA | Dear Kitty. Some blog
Pingback: Great blue heron feeds, video | Dear Kitty. Some blog
Pingback: Mourning doves in the USA | Dear Kitty. Some blog
Pingback: Praying mantis in the USA | Dear Kitty. Some blog
Pingback: Molting birds in New York state, USA | Dear Kitty. Some blog
Pingback: American blue jay stores safflower seed | Dear Kitty. Some blog
Pingback: American woodpeckers at owls’ nest | Dear Kitty. Some blog
Pingback: Cuban black-throated blue warblers and pygmy owl | Dear Kitty. Some blog
Pingback: Acorn woodpeckers at Texas hummingbird feeder | Dear Kitty. Some blog
Pingback: Woodpeckers in Canada, videos | Dear Kitty. Some blog
Pingback: Yellow-bellied sapsucker woodpecker in the USA | Dear Kitty. Some blog
Pingback: Canadian sapsuckers help hummingbirds, video | Dear Kitty. Some blog