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AnAge entry for Molothrus ater

Classification (HAGRID: 01662)
TaxonomyKingdom: Animalia
    Phylum: Chordata
        Class: Aves (Taxon entry)
            Order: Passeriformes
                Family: Icteridae
                    Genus: Molothrus
SpeciesMolothrus ater
Common nameBrown-headed cowbird

Lifespan, ageing, and relevant traits

IMR0.45/year
MRDTNot yet available
Maximum longevity16.9 years (wild)
Sourceref. 577
Sample sizemedium
Data qualityacceptable
Observations

IMR was calculated from demographic data in the wild. Females may lay up to 40 eggs in a season [0437].

Life history traits (averages)

Female sexual maturity365 days
Male sexual maturity365 days
Incubation11 days
Clutch size (oviparous)
Clutches per year1
Weight at hatching2.22 g
Adult weight38.1 g
Postnatal growth rate0.576 days-1 (from logistic function)

Metabolism

Typical body temperatureNot yet available
Basal metabolic rate0.6315 W
Body mass42.5 g
Metabolic rate per body mass0.014859 W/g

References
[0732] Starck and Ricklefs (1998), Avian growth rate data set
[0577] Klimkiewicz and Futcher (1989), Longevity records of North American birds: Supplement I
[0425] Bennett and Harvey (1987), Active and resting metabolism in birds: allometry, phylogeny and ecology
[0444] John Terres (1980), The Audubon Society Encyclopedia of North American Birds
[0437] FEIS by the USDA Forest Service
[0445] The Birds of North America Online

External resources

Integrated Taxonomic Information SystemITIS 179112
Animal Diversity WebADW account
Encyclopedia of LifeSearch EOL
Genome ProjectSearch NCBI
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