the american crow
DESCRIPTION
The American Crow. ( Corvus brachyrhynchos) . Clas sification. Kingdom –Animalia ( Animal ) Phylum – Chordata Class- Aves ( Bird ) Order- Passeriformes ( ½ of all bird species ) Family- Oscine Genus- Corvus ( Crows and Ravens ) Species- American Crow. Characteristics. - PowerPoint PPT PresentationTRANSCRIPT
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THE AMERICAN CROW(Corvus brachyrhynchos)
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Classification
• Kingdom –Animalia ( Animal )
• Phylum – Chordata
• Class- Aves ( Bird )
• Order- Passeriformes ( ½ of all bird species )
• Family- Oscine
• Genus- Corvus ( Crows and Ravens )
• Species- American Crow
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Characteristics
• Males and females are almost identical
• Males are bigger then females
• Weight – 1 pound or 16 ounces
• Size – 17-19 inches
• Wingspan – Average of 33-36 inches
• Pelage – Feathers (black)
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DistributionCrows live in almost all parts of the world except Antarctica,
bottom part of South America and New Zealand.
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Habitat
• Open spaces
• agricultural fields
• coastal wetlands
• marshes
• rivers and streams
• Don’t live in forests or deserts
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Conservation
• IUCN Red List conservation status is least concern
• Crows are a thriving species
• Crows are increasing
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Reproduction
• The Mating system of crows are a rare sight
• Female choses the mate
• Male shows off his feathers to the female
• The male bows and spreads his wings and tail while singing a
short song for the female
• They groom each others feathers and touch their beaks together
• All of this is only preformed once prior to mating
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Reproduction
• Crows usually mate early in life, but some wait until they’re two
• A crow will typically have three eggs in a successful nest
• With most nests, 2/3 of the nest won’t survive past their first year
• So, only 1/3 of the nest will survive
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Parental Care
• It takes 6 days to lay the eggs and 19 days of incubation
• This is all done by the female
• The hatchlings stay in the nest for about 2 months
• The male protects and gathers food, the female watch the baby
birds and does not leave the nest unless to get water
• Both male and female work together to take care of their young
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Longevity and Morality
• Crows in the wild will live from 6 to 7 years
• In captivity, crows can live up to 20 years of age,
sometimes longer if in very ideal conditions
• Males and females live for the same amount of years
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Seasonal Patterns
• When winter comes, crows fly down from the north to
warmer climates
• They do not hibernate
• Crows also do not undergo torpor
• During different seasons, crows do not change their
behavior
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Predator Relationships• Horned owls, eagles, falcons,
and large red-tailed hawks are the main hunters
• Humans were a huge threat back in the 1960’s when they were shot for sport
• In 1972 however, crows were added the federal law keeping them from being hunted
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Human Relationships
• As said before, humans once hunted crows so much that their numbers greatly decreased in the 1960s
• Now, scientists are finding ways that we can work with crows as they are very intelligent
• Some people still see them as just pests or a nuisance
http://www.ted.com/talks/joshua_klein_on_the_intelligence_of_crows.html
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INTERESTING FACTS• Groups of crows are called “murders”. The reason for this is that
when a crow is dying of sickness, old age, or injury, the rest of the murder will often kill that crow in order to end it’s suffering.
• Crows have the biggest brain based on body size out of all birds.
• Crows have the ability to judge the character of people by reading their faces and expressions.
• Just like parrots, crows can imitate human voice.
• Crows are a lot smarter than other birds, like owls, which is one of the crows predators. Furthermore, they also exceed the intelligence of parrots.
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Works Cited
All About Birds. N.p., n.d. Web. 26 Feb. 2013. <http://allaboutbirds.org/guide/American_Crow/id>.Angell, Tony. Ravens, Crows, Magpies and Jays. Seatlle and London: UOWP, 1978. Print.Animal Diversity Web. UOM, n.d. Web. 24 Mar. 2013. <http://animaldiversity.ummz.umich.edu/accounts/Corvus_brachyrhynchos/>.Crow Busters. N.p., 1999. Web. 26 Feb. 2013. <http://www.crowbusters.com/facts.htm>.Crow Facts. N.p., n.d. Web. 24 Mar. 2013. <http://www.shades-of-night.com/aviary/crowdoc.html>.FREQUENTLY ASKED QUESTIONS ABOUT CROWS. Dr. Kevin J. McGowan, n.d. Web. 24 Mar. 2013. <http://www.birds.cornell.edu/crows/crowfaq.htm#roost>.Johnson, Sylvia. Crows. N.p.: Carolrhoda Books, 2005. Print.Joshua Klein: The Intelligence of Crows. TED Ideas worth Spreading. TED Confrences, n.d. Web. 24 Mar. 2013. <http://www.ted.com/talks/joshua_klein_on_the_intelligence_of_crows.html>.
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