Monday, March 19, 2012

Woodpeckers

Woodpeckers

Background Information

Family- Picidae
Range- Internationally dispersed in woodlands everywhere except Australia
Diet-  fruit, nuts, acorns, and Insects
Behavior- pointed beak used as a both a chisel and crowbar tool.  This tool is used to peel back tree bark and utilizing a long sticky tongue in order to capture insects.                                                                       
World dispersal picture:  
http://www.google.com/imgres?hl=en&safe=off&sa=X&biw=1639&bih=800&tbm=isch&prmd=imvnsb&tbnid=LqgsRTbRevtPxM:&imgrefurl=http://www.defenders.org/wildlife_and_habitat/wildlife/woodpeckers.php&docid=4qWAY8ooCAmh5M&imgurl=http://www.defenders.org/images/factsheets/range/RangeMap_woodpecker_550x400.jpg&w=550&h=400&ei=iORnT7KMBoeFsALjl6idCQ&zoom=1&iact=hc&vpx=193&vpy=318&dur=405&hovh=190&hovw=261&tx=70&ty=68&sig=104492569353466368237&page=1&tbnh=146&tbnw=199&start=0&ndsp=35&ved=1t:429,r:9,s:0  
Woodpeckers have zygodactyl feet which includes clawed toes in order to grasp tree limbs for use while hammering trees with their pointed beaks.
Some species drum on trees to communicate to other woodpeckers and as a part of their courtship behavior. Woodpeckers tap an estimated 8,000-12,000 times per day. 
Red Headed Woodpecker
Diagnostic Features (adult):         
medium sized woodpecker,
 Red Hood,
White chest
Diagnostic Features (juvenile):
Gray brown head
 black stripes on white secondary feathers
Behavior- One of the most aggressive and omnivorous woodpeckers.  One of the only woodpeckers to store and cover food.  This bird can actually store live crickets but places them in such tight quarters that they cannot escape.
Habitat-Breeds in deciduous woodlands : beach or oak, old burned areas, grooves of dead trees
Winters in mature stands of forest
Nesting- nests in holes of dead trees
Food- Most omnivorous diet: oak mast, seeds,
bird eggs, fruit nuts, insects, mice, and nuts     
Red-Bellied Woodpecker
Diagnostic Features (adult)-
Round head
Pale underbelly
Black and white spotted wings
Red nape and cap
Diagnostic Features (juvenile)-                                                                                                           
Similar to adult with not as developed red nape and cap
Behavior-Famous for picking at bark rather than drilling into it.  Stay on tree limbs unless nesting
Habitat-Very common in eastern woodlands, wooded shrubs, and forests of the United States.  Very common in pine forests of many varieties. 
Nesting-Will steal the nesting cavities of other woodpeckers but many times have their own nests stolen by the European Starling.  If they create their own nesting cavity they will nest in the shavings they have created.
Food- Eat insects, spiders, arthropods, fruits, nuts, seeds, and pine cones.  Males have a longer tongue in order to fill a different niche space in the same habitat as its mate.
Northern Flicker
Diagnostic Features:
large woodpecker
 round head
Flared tail that tapers to a point
Flash of red color in the wings of western birds
Flash of yellow color in wings of eastern birds
Down curved bill
Brown plumage with black spots and crescents
White rump
 Call: http://www.allaboutbirds.org/guide/northern_flicker/id/acNorthern  
Behavior-Often spotted on the ground rather than in the trees because they mainly eat beetles and ants that they dig up from the soil. One of the only strongly migratory woodpeckers. Use their beaks for communication and frightening invaders
Food-A mostly carnivorous diet that focuses on insects it laps up with its long barbed tongue
Habitat-Live in open woodlands with a lot of open land it can use to dig up its meals. Also found in edges and parks.
Nesting- Both sexes help to make nesting cavities in dead tree trunks or branches. 
Downy Woodpecker
Diagnostic features-
-Smaller woodpecker
-Bill is relatively smaller for
  their body plan than other woodpeckers
-Black upper parts of the
  wings are checkered with white
-Head is boldly striped
-Bold white stripe down the back
-Males have small red patch on the head
-The outer tail feathers are white with few black spots. 
Behavior-
move more acrobatically than larger woodpeckers, having a rising a falling flight style like other woodpeckers
in winter, they are frequent members of mixed species flocks
Diet
male and females divide up where they search for food
eats food larger woodpeckers cannot reach
Habitat
Open woodlands (deciduous forests near streams)
Nesting
Small stubs of dead or living trees
Entry way is on underside
Wood is often infected with fungus to assist in excavation process  
Hairy Woodpecker
Very similar to the downy woodpecker but bigger with a few different distinguishing characteristics.
Stout, pointed bill is nearly as long as the head
White and black wings with white barring
Black tail with white edges
Black and white face
Males have a flash of red at the back of the head

•    Behavior-
    –Hitch up trees among main branches
    –Have slowly undulating flight pattern
     •Diet-
    –More than 75% is made up of insects, particularly the larvae of wood-boring beetles and bark beetles, ants, and moth pupae in their cocoons
     •Habitat-
   –Hairy Woodpeckers are common in mature woodlands with medium to large trees
•    Nesting-
In a dead stump of living trees (~2 in. entry, usually on the underside). Start excavation < 2 weeks before laying eggs. 
Comparison of Downy and Hairy Woodpeckers
Pileated Woodpecker
Diagnostic characteristics–
Largest woodpecker in NA
White patch on wings
Solid black back & underparts
Both males and females have red crest
Females have dusky gray foreheads & mustache stripes
Males show red mustache stripe
Call: http://www.allaboutbirds.org/guide/Pileated_Woodpecker/id/ac
     •Behavior-
    –Works on branches, trunks, and logs
    –Makes rectangular excavations
    –Pries off long slivers of bark for ants
     •Diet-
    –Insects
    –Feeding excavations very extensive
     •Habitat-
    –Deciduous or coniferous forests with large trees
      •Nesting
Similar nesting as other woodpeckers
 





                   





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