34 Timothy S. Young and Joshua Laerm 



CLASS AVES 



Order Podicipediformes 



Family Podicipedidae 



Podiceps auritus (Linnaeus) 



Horned Grebe 



Material— Distal portion of left ulna, USNM209968. 

 Remarks — Today the species winters in coastal areas and 

 infrequently occurs in freshwater (Sprunt 1954). 



Podilymbus podiceps (Linnaeus) 

 Pied-billed Grebe 



Material— Right humerus, USNM210293, 210294, 210301, 210302; 

 humerus, USNM210311; right proximal humerus, USNM210304; left 

 humerus, USNM210307; left tibial fragments, USNM210292, 210308, 

 210309, 210315, 210322, 210325, 210327; right tibia, USNM210297, 

 210300, 210312, 210316, 210317; left ulna, USNM210296, 210303, 

 210305, 210306, 210310, 210328, 210329; right ulna USNM210313, 

 210321; radius, USNM210298; right coracoid, USNM210319; left 

 coracoid, USNM210320; left femur, USNM210298; right 

 carpometacarpus, USNM210321; left carpometacarpus, USNM210323; 

 scapula, USNM210324; pedal phalanx, USNM210326; tarsometatarsus, 

 USNM210314, 210318; left tibia, USNM210306. 



Remarks — The species inhabits freshwater marshes and ponds, 

 but also is associated with saltwater in winter (Sprunt 1954). 



Order Pelecaniformes 



Family Phalacrocoracidae 



Phalacrocorax auritus (Lesson) 



Double-crested Cormorant 



Material— Left radius, USNM209845; left ulna, USNM209844; 

 scapula, USNM209859; anterior sternum, USNM209843; left coracoid, 

 USNM209858; phalanx 1 of digit II, USNM209861, 209852; phalanx 

 2 of digit II, USNM209856; left humerus, USNM209846; right 

 humerus, USNM209851; proximal radius, USNM209860; right ulna, 

 USNM209852; distal tibia, USNM209848; right femur, USNM209854; 

 right mandible, USNM209855; left mandible, USNM209850; sternal 

 fragment, USNM209857; left coracoid, USNM209849; right coracoid, 

 USNM209847. 



Remarks — This species is distributed in large rivers and lakes as 

 well as brackish and saltwater systems (Sprunt 1954). 



