### animal | vertebrate | bird:

Bluebird
* Most bluebirds defend territory
  - drink water
* Most bluebirds eat bugs
  - dead bugs
  - grubs
* Most bluebirds have babies
  - homes
  - love fruit
  - make songs
* Most bluebirds prefer habitats
  - nest sites
  - produce sound
  - survive years
* Some bluebirds die of wounds.
* Some bluebirds eat earthworms
  - mealworms
  - feed on berries
  - have predators
  - migrate south
  - prefer orchards
  - provide food
* also are attracted to dripping water
  - eat many caterpillars
  - exist in old orchards and cutover woodlands
  - like to perch and eat berries from fruiting trees
  - nest in abandoned woodpecker nest holes
  - participate in courtship feeding during breeding season
  - utter a variety of short call notes
* are attracted to shallow water for bathing if perches are located nearby
  - both migrants and summer residents in New England
* are cavity nesters, nesting in hollows in trees
  - common
  - excellent parents
  - fond of peanut hearts and meal worms
  - ground feeders - they like short grass and open areas
  - less likely to nest in a box that has an old nest in it
  - located in windowsills
  - members of the thrush family, kin to robins and native only to North America
  - more likely to use water that has perches nearby
  - often the target of predators such as raccoons, squirrels, cats, snakes, and hawks
  - one of Pennsylvania's most beloved songbirds
  - only one of many species pairing off
  - primarily insect eaters
  - quite tolerant of human presence but be prepared for some dive-bombing
  - really grassland birds
* are secondary cavity nesters that use the cavity of abandoned woodpecker nests
  - nesters, which means they use preexisting cavities for nesting sites
  - sleeping
  - smaller and colored with blue where a robin is gray
  - territorial and don t want other birds any closer
  - typically insect and fruit eaters
  - usually there summer and winter
  - very tolerable of humans
  - year-round residents of Missouri
* belong to the thrush family, whose members are found throughout much of the world.
* breed more than once a year.
* bring bright berries.
* build a neat, cup-like nest of grasses or pine needles
  - new nest for each brood
* can also learn to eat suet during colder months.
* catch fly insects
* do relish live waxworms, but they are considerably more expensive than mealworms
  - use nest boxes placed where large open areas meet woodlands
  - insects and fruit
  - large quantities of insects
  - lots of grasshoppers, crickets, caterpillars, beetles, and worms
  - many species of beetles, grasshoppers and crickets
  - small fruits and hunt insects, spiders, and other creatures from above
* feed on ground-dwelling insects while swallows feed on insects in the air
  - primarily on insects
* feed primarily on the ground like the robin, to whom they are related
  - ground-like the robin, to whom they are related
  - their young in a meadow
* gather insects from leaves, branches, and the ground.
* generally live in three overlapping regions of North America
  - mate the year after they hatch
  - prefer rural areas
  - return to the same area each year
* have a cheerful call and a sweet, warbling song
  - squat appearance when perched
  - territory range that is anywhere between two to twenty-five acres
  - problems with other animals too
  - cell membranes
  - heads
  - nuclei
  - second joints
  - skulls
  - sterna
  - vacuoles
* leave very clean nests for the most part.
* like to have perches nearby to preen afterward
  - nest near open fields on forest edges
* live in rural and urban areas.
* look for arrowwood viburnum with ripe berries.
* mate for life.
* nest in boxes in the openings
  - up in the mowed park area, and sparrows are abundant year round
* nest in natural cavities and nest boxes
  - tree cavities and old woodpecker holes
  - the snags in the swamp areas
  - tree cavities and fly among field grasses looking for insects
  - primarily in suburban and rural areas
* obtain their food in the air, in the trees, and on the ground.
* often have two broods in a season.
  - more open spaces than places with a lot of trees
  - open grassy areas with enough trees or wires to provide perches
  - soft grasses, fragrant pine needles, or even strips of bark as nesting material
* prefer to nest in open areas such as grassy fields
  - open, sunny areas where they can swoop in and out to feed their young
* produce bluebirds
* readily nest in man-made cavities.
* require semi-open land with short grasses and gardens that are surrounded by woodlands.
* seek protective space to rear their young.
* take up residences.
* use existing cavities in trees for their nests.
* usually have two broods per season, but three broods are possible
  - nest along woodland edges of open fields or other open areas