### animal | vertebrate | bird:

Old bird
* are generally immune as a result of prior infection.
* have darker, hard- skinned legs, brittle breastbones and inflexible beaks
  - hard-skinned legs, brittle breastbones and inflexible beaks

Older bird
* are higher in the peck order than younger ones.
* are more efficient at finding food than younger birds
  - likely to be disease carriers
* can form strong bonds with their owners if given the time to trust their new owners
  - make it up to two hours between feedings
* develop immunity as the result of exposure.
* exhibit signs of molting.
* have a strongly washed pink coloring on the head and breast.
* seem to take longer to soften then young ones.

### animal | vertebrate | bird:

Oriole
* All orioles are featherless when they first hatch, but they quickly grow a set of downy feathers
  - have long bills and are about seven to eight inches long
* Most orioles eat insects
  - feed on insects
  - get plumages
* Most orioles have bills
  - black feathers
* Most orioles have orange feathers
  - undersides
* Most orioles live for years
  - up to years
* Most orioles prefer trees
  - woodlands
  - return to habitats
* Most orioles roost in big trees
  - sing songs
  - take flight
* Some orioles eat caterpillar larvae
  - caterpillars
  - fruit
  - mollusks
  - feed on caterpillars
  - have habits
* always sing from the tallest trees.
* are beneficial because they also eat many harmful insects
  - birds
  - nectar-loving birds
  - tropical migrants, and their migration is closely timed with daylength
* breed in open woods, elms, and shaded trees.
* build hanging nests made of grass and tree bark
  - nests on their breeding grounds
* eat beetles, grasshoppers, spiders, and fruit, such as mulberries and wild black cherries
  - insects and drink nectar from flowering plants
* forage for insects.
* have a rich, full-throated whistle
  - very long migration pattern, and they fly it at night to avoid predators
  - bright colored feathers
* includes air sacs
  - bird's feet
  - brains
  - breasts
  - cell membranes
  - cells
  - chest cavities
  - chests
  - corpi
  - cytoplasm
  - faces
  - flight feathers
  - heads
  - lips
  - mouths
  - nuclei
  - plasma membranes
  - quill feathers
  - rib cages
  - second joints
  - sections
  - skulls
  - sterna
  - talons
  - vacuoles
  - wishbones
* leave early.
* love loquat trees.
* love the color and taste of oranges
  - sight and sound of moving water
* migrate south to Mexico in the winter.
* mostly eat fruit and drink flower nectar.
* nest high in trees often over a stream, river, street or driveway.
* prefer nesting in large shade trees
  - open woodlands, river groves and tall shade trees with shrubby undergrowth
* select nest sites
* sing on every side, hidden by leafy green
  - tunes
* use bills
  - silk from milkweed pods
* usually have a lifespan of three to seven years.
* visit yards.
+ Bird nest, Types of nests, Cup nest: Birds
  * There are several types of cup nests. A 'suspended cup nest' is attached to the branch at the top and sides but then drops like a bag down below. It really looks more like a vase than a cup. The bird is almost hidden when she warms her eggs. The mother bird can sit down on the branch above the nest and bend down to feed her baby birds. Orioles are very famous for building amazingly long bags that hang far below the branch.

### animal | vertebrate | bird | oriole:

Bobolink
* also use the starry night sky to guide their travels.
* are birds
  - now a protected species and are no longer hunted
  - very common and their songs fill the air in spring and early summer
* feed and nest in unmowed farm fields.
* is an oriole
* migrate at night.
* nest in hayfields and meadows.

Lark
* eat both insects and grass seeds.
* tend to walk along the ground instead of hopping.