MitoAge

Molothrus ater

Brown-headed cowbird

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Maximum lifespan
16.9 yr
AnAge record
mtDNA size
16,758 bp
RefSeq NC_051468.1
GC content
46.27%
Whole genome
Non-coding
1,277 bp
Including the D-loop

Where Brown-headed cowbird sits among 2,335 species

Whole-genome GC content against maximum lifespan. Brown-headed cowbird has the 1,119th longest lifespan of them.

10203040501 yr10 yr100 yrMaximum lifespan, log scaleGC %Brown-headed cowbird
  • This species
  • Other birds
  • Other classes
Plot other mtDNA features with this species highlighted

Base composition

Whole genome16,758 bp
GC skew (G − C) / (G + C)
−0.384
AT skew (A − T) / (A + T)
+0.132

Life history

Maximum lifespan
16.9 years
Adult weight
38.1 g
Birth weight
2.2 g
Basal metabolic rate
0.632 W
Female sexual maturity
365 days
Male sexual maturity
365 days
Gestation or incubation
11 days
Litters per year
1
Postnatal growth rate
0.576 per day

Lifespan from AnAge · AnAge record · other traits from AnAge build 15 (HAGRID 00954)

About this record

Lifespan source
AnAge build 15
Based on
an animal in the wild
Data quality
acceptable, medium sample
Licence
Free to use, subject to the Human Ageing Genomic Resources conditions of use
Status
New in build 2
In the database since
build 2 (2026-11-13)

Every change against the 2015 build is in the changelog download.

Composition by region

Reference (L) strand as deposited in RefSeq
Whole genome16,758 bp
Protein-coding11,379 bp
12S rRNA981 bp
16S rRNA1,595 bp
All tRNA1,538 bp

Genes and regions

Select a column to sort; select a gene to compare it across species
Composition
ND1NADH dehydrogenase subunit 1978 bp26.7%26.3%14.9%32.1%47.04%−0.365+0.008
ND2NADH dehydrogenase subunit 21,040 bp30.7%23.3%10.2%35.9%46.06%−0.557+0.137
COX1Cytochrome c oxidase subunit I1,551 bp28.0%24.8%16.9%30.3%47.20%−0.284+0.060
COX2Cytochrome c oxidase subunit II684 bp30.1%21.9%14.5%33.5%47.95%−0.396+0.157
ATP8ATP synthase F0 subunit 8168 bp28.6%25.6%8.3%37.5%45.83%−0.636+0.055
ATP6ATP synthase F0 subunit 6684 bp30.0%24.1%9.9%36.0%45.91%−0.567+0.108
COX3Cytochrome c oxidase subunit III785 bp27.4%25.0%15.0%32.6%47.64%−0.369+0.046
ND3NADH dehydrogenase subunit 3351 bp28.5%24.2%12.3%35.0%47.29%−0.482+0.081
ND4LNADH dehydrogenase subunit 4L297 bp27.6%24.6%12.1%35.7%47.81%−0.493+0.058
ND4NADH dehydrogenase subunit 41,378 bp30.3%22.5%10.9%36.3%47.17%−0.538+0.148
ND5NADH dehydrogenase subunit 51,818 bp30.4%22.5%12.0%35.1%47.09%−0.491+0.150
ND6NADH dehydrogenase subunit 6519 bp38.9%10.4%9.1%41.6%50.67%−0.643+0.578
CYTBCytochrome b1,143 bp28.2%23.4%12.7%35.8%48.47%−0.477+0.093
12S rRNA12S ribosomal RNA981 bp31.5%20.1%20.6%27.8%48.42%−0.149+0.221
16S rRNA16S ribosomal RNA1,595 bp34.3%21.1%19.6%25.0%44.64%−0.121+0.239

Codon usage

Counts per codon, darker is more frequent

3,797 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).

Phe F5.8%
UUU43
UUC177
Leu L17.8%
UUA66
UUG17
CUU55
CUC173
CUA317
CUG49
Ile I7.7%
AUU75
AUC216
Met M4.0%
AUA117
AUG36
Val V5.2%
GUU33
GUC65
GUA74
GUG27
Ser S7.6%
UCU34
UCC95
UCA88
UCG9
AGU11
AGC50
Pro P5.8%
CCU26
CCC77
CCA107
CCG11
Thr T8.5%
ACU48
ACC138
ACA128
ACG10
Ala A8.0%
GCU40
GCC163
GCA85
GCG16
Tyr Y2.9%
UAU17
UAC93
His H2.6%
CAU18
CAC81
Gln Q2.5%
CAA89
CAG7
Asn N3.5%
AAU12
AAC121
Lys K2.2%
AAA85
AAG0
Asp D1.8%
GAU12
GAC56
Glu E2.4%
GAA72
GAG19
Cys C0.8%
UGU5
UGC24
Trp W2.8%
UGA101
UGG5
Arg R1.9%
CGU7
CGC17
CGA44
CGG5
Gly G5.8%
GGU24
GGC70
GGA96
GGG31
Stop 0.3%
UAA6
UAG1
AGA1
AGG2

Genome map

37 annotated features in NC_051468.1

Hover, tap or tab to a feature to see its position, length, strand and GC content. Genes and rRNAs open their own pages.

  • Protein-coding13
  • rRNA2
  • tRNA22
  • Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
  • Middle ring: GC% of each gene against the whole genome (46.3%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).
All 37 features as a table
FeatureTypeStartEndLengthStrandGC
tRNA-PheTransfer RNA16868 bp+–
12S rRNARibosomal RNA681,048981 bp+48.4%
tRNA-ValTransfer RNA1,0481,11770 bp+–
16S rRNARibosomal RNA1,1182,7121,595 bp+44.6%
tRNA-Leu (UUR)Transfer RNA2,7132,78775 bp+–
ND1Protein-coding gene2,7973,774978 bp+47.0%
tRNA-IleTransfer RNA3,7823,85372 bp+–
tRNA-GlnTransfer RNA3,8593,92971 bp−–
tRNA-MetTransfer RNA3,9293,99769 bp+–
ND2Protein-coding gene3,9985,0371,040 bp+46.1%
tRNA-TrpTransfer RNA5,0385,10770 bp+–
tRNA-AlaTransfer RNA5,1095,17769 bp−–
tRNA-AsnTransfer RNA5,1865,25873 bp−–
tRNA-CysTransfer RNA5,2595,32567 bp−–
tRNA-TyrTransfer RNA5,3265,39570 bp−–
COX1Protein-coding gene5,3976,9471,551 bp+47.2%
tRNA-Ser (UCN)Transfer RNA6,9397,01173 bp−–
tRNA-AspTransfer RNA7,0177,08569 bp+–
COX2Protein-coding gene7,0947,777684 bp+48.0%
tRNA-LysTransfer RNA7,7797,84668 bp+–
ATP8Protein-coding gene7,8488,015168 bp+45.8%
ATP6Protein-coding gene8,0068,689684 bp+45.9%
COX3Protein-coding gene8,6969,480785 bp+47.6%
tRNA-GlyTransfer RNA9,4809,54869 bp+–
ND3Protein-coding gene9,5499,899351 bp+47.3%
tRNA-ArgTransfer RNA9,9019,97070 bp+–
ND4LProtein-coding gene9,97210,268297 bp+47.8%
ND4Protein-coding gene10,26211,6391,378 bp+47.2%
tRNA-HisTransfer RNA11,64011,70970 bp+–
tRNA-Ser (AGY)Transfer RNA11,71011,77566 bp+–
tRNA-Leu (CUN)Transfer RNA11,77511,84571 bp+–
ND5Protein-coding gene11,84613,6631,818 bp+47.1%
CYTBProtein-coding gene13,67214,8141,143 bp+48.5%
tRNA-ThrTransfer RNA14,81814,88669 bp+–
tRNA-ProTransfer RNA14,89414,96370 bp−–
ND6Protein-coding gene14,97215,490519 bp−50.7%
tRNA-GluTransfer RNA15,49215,56271 bp−–

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