ν θ ρ α ξ ▁anth ra x , ▁α ν θ ρ α κ ος ▁anth rak os ▁meaning ▁" co al ▁black " ▁and ▁ κ ε ρ α ς ▁ker as , ▁ κ ε ρ ω ς ▁ker ō s ▁meaning ▁" horn ". ▁A ▁mole cular ▁ph y log en etic ▁study ▁published ▁in ▁ 2 0 1 3 ▁found ▁that ▁Anth rac oc eros ▁was ▁sister ▁to ▁the ▁genus ▁O cy cer os ▁which ▁contains ▁the ▁three ▁grey ▁horn b ill ▁species . ▁ ▁The ▁genus ▁contains ▁five ▁species : ▁ ▁References ▁▁▁ ▁Category : B ird ▁gener a <0x0A> </s> ▁William ▁Am bro se ▁Jenkins ▁( born ▁November ▁ 2 , ▁ 1 9 1 7 ▁in ▁Kansas ▁City , ▁Missouri ) ▁is ▁a ▁retired ▁United ▁States ▁Coast ▁Guard ▁rear ▁adm iral . ▁He ▁graduated ▁from ▁the ▁United ▁States ▁Coast ▁Guard ▁Academy ▁on ▁Dec . ▁ 1 9 , ▁ 1 9 4 1 , ▁ 1 2 ▁days ▁after ▁Pear l ▁Har bor . ▁▁ ▁After ▁gradu ating ▁from ▁flight ▁training ▁in ▁ 1 9 4 4 , ▁he ▁fle w ▁ 2 3 ▁different ▁types ▁of ▁aircraft ▁and ▁hel ic op ters ▁during ▁his ▁career ▁in ▁the ▁Coast ▁Guard . ▁ ▁He ▁graduated ▁from ▁the ▁National ▁War ▁College ▁in ▁Washington , ▁DC ▁in ▁ 1 9 6 5 . ▁ ▁He ▁was ▁Chief ▁of ▁the ▁Law ▁En for cement ▁Division ▁and ▁Program ▁Manager ▁at ▁US CG ▁Head quarters , ▁ear ning ▁Coast ▁Guard ▁Comm