@Misc{Wiki,
 howpublished = {\url{http://en.wikipedia.org/wiki/Pheucticus_melanocephalus}}
} 

@Book{Kooy2010,
 author = {Kooijman, S.A.L.M.},
 year = {2010},
 title  = {Dynamic Energy Budget theory for metabolic organisation},
 publisher = {Cambridge Univ. Press, Cambridge},
 pages = {Table 4.2 (page 150), 8.1 (page 300)},
 howpublished = {\url{../../../bib/Kooy2010.html}}
} 

@Misc{AnAge,
 howpublished = {\url{https://genomics.senescence.info/species/entry.php?species=Pheucticus_melanocephalus}}
} 

@Misc{avibase,
 howpublished = {\url{https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=824361E5ACCA64DB&sec=lifehistory}}
} 

@misc{WyatFran2020,
 doi = {10.2173/bow.bkhgro.02},
 author = {Hill, G. E.},
 year = {2022},
 title =  {Black-headed Grosbeak (\emph{Pheucticus melanocephalus}), version 2.0. In Birds of the World (S. M. Billerman and B. K. Keeney, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA}
} 

@article{West1955,
 author = {Weston, H. G.},
 year = {1955},
 title =  {Notes on the development of immature Black-headed Grosbeaks},
 journal = {Proceedings of the Iowa Academy of Science},
 volume = {61},
 pages = {636–646}
} 

@Article{PrinPres1991,
 doi = {10.1016/0300-9629(91)90122-S},
 author = {R. Prinzinger and A.Pre{\ss}mar and E. Schleucher},
 year = {1991},
 title = {Body temperature in birds},
 journal = {Comp. Biochem. Physiol.},
 volume = {99A(4)},
 pages = {499-506}
}