### animal | vertebrate | bird | woodpecker:

Downy woodpecker
* Most downy woodpeckers have feathers
* are attracted to areas where food is abundant
  - our smallest and most commonly seen woodpeckers
  - small birds with white stomachs, breasts and backs and black tails and wings
* create nest hole openings that are concealed by fungus or lichens.
* prefer the same habitat as man, open woodlands, orchards and suburbs.

### animal | vertebrate | bird | woodpecker:

Flicker
* Some flickers feed on ground insects, especially ants.
* adopt a nest box more readily if it is placed above surrounding foliage.
* are among the birds suffering from nomenclaturitis
  - attracted to suet feeders, especially in winter
  - flashs
  - jay-sized woodpeckers
  - strange woodpeckers because they get their food from the ground instead of from a tree
* are the only woodpeckers that frequently feed on open ground
  - woodpecker most likely to be found on the ground where they feed on ants
* build their nests in holes that they dig in trees with their bills.
* can occasionally produce headaches and eyestrain in some people.
* eat a lot of ants on the ground, on people's lawns
  - more ants than any other birds do
* excavate larger holes higher on the stem.
* feed on insects, including woodborers and beetles.
* find much of their food on the ground.
* have black spots on a tannish-white breast and belly.
* is caused by having the refresh rate set too low
  - large, rapidly fluctuating loads such as arc furnaces and electric welders
  - untimely fading of phosphor due to a slow vertical refresh
* is the main cause of eyestrain
  - name of several species of woodpeckers that live in North America and South America
  - primary cause of vision-related problems
  - visible pulsation of a light source
* natural by-product of CRT technology.
* often forage on the ground for ants which make up about half of their diet.
* primarily forage on the ground in open areas for ants and other insects.
* reside in lightly wooded areas near farmlands.

Hairy woodpecker
* Most hairy woodpeckers eat larvae
  - have wings
* Most hairy woodpeckers inhabit forest woodlands
  - nest in trees

### animal | vertebrate | bird | woodpecker:

Sapsucker
* also associate with only aspen of a reasonable size.
* are a group of four species known for literally drinking the sap of trees
  - present, leaves are off the trees, and the birds are active
  - the most migratory of all the woodpeckers
* can drill as many as fifty holes per hour into trees.
* create the holes and feed on sap.
* drill many holes around a tree trunk then come back and eat the bugs trapped in the sap
  - very small holes in trees to feed on sap
* feed on the sap of living trees, rather than on insects in dead or dying wood
  - sap, and songbirds such as the pine siskin and chickadee feed on the seeds
  - tree sap as well as insects
* have brush-like tongues that hold the sap of trees by capillary action
  - white rumps and white patches on their shoulders
* inhabit forests, orchards, and woodlots.
* kill trees.
* live in woodlands and aspen groves, and can also be found in orchards in the winter.
* only drill holes during the spring and summer, while sap is running.
* spend the summer in Canada and the winter in the southern United States.
* usually excavate a new nest each year, sometimes in the same tree.

Wryneck
* are birds
* feed mainly on ants and their larvae.
* get their name from the unusual, snakelike way they twist their neck when captured.
* prefer open forests, clearings, and woodlands with low undergrowth.