BIRDS OF NEW YORK STATE 'il 



Grebe, Holboell (Colymbus holbcelli) 



This is the largest of the grebes. Like other grebes it has 

 broadly lobed feet for swimming. The tail is rudimentary. 



19-22.25 



Call no. 



Nu GsH Adult in Winter Plumage, Standing in Water near Ice, 

 Erect with Head Thrown Back. Arcade. (About 1905) 



R. H. Beebe 



Note the posterior position of legs. Compared with that of 

 ducks andgeese. This bird stands nearly in a perpendicular posi- 

 tion. When photographed it was in a weakened condition. The 

 winter was severe and the streams and lakes were almost entirely 

 frozen over. Large numbers of these birds perished at this time. 



Nu GsH4 Immature Bird (a captive) Resting on a Table. (1910) 



Bailey 



Grebe, Pied-billed (Podilymbus podiceps) 



Other names are hell-diver, dipper, diedapper and water-witch. 

 I'his grebe may be distinguished from the others by its short, 

 thick bill. Look for the black throat patch and band on the bill, 

 distinctive marks during the breeding season. It is becoming 

 less common as marshy ponds and streams are being drained and 

 lakes are frequented by hunters and pleasure seekers. 12-14 



Nu GsP Nest with Eggs, Adult and Young Swimming beside It. 

 Michigan hollow, near Ithaca. (June 18, 1913) Allen 



The nest is usually supported on submerged weeds or rubbish, 

 but sometimes floats on the water, anchored to nearby stems. 

 The young swim as soon as hatched. 



Nu GsPl Nest with Eggs, Typical Surroundings. Michigan hollow^, 

 near Ithaca. (June 18, 1913) Allen 



Note the comparatively exposed position. This grebe prefers 

 shallow water. The eggs did not show until the photographer 

 uncovered them. 



Nu GsP2 Nest with Eggs Covered by Adult with Nesting Material. 

 Michigan hollow, near Ithaca. (June 10, 1913) Allen 



When this bird leaves its nest for forage or when it is fright- 

 ened by the appearance of an enemy, it covers the eggs with 

 material from the nest. Why? 



