Expedition to the Zambesi River. ^77 



note which it utters from the tops of trees. It is fond of the 

 vicinity of running water, especially where there are patches 

 of rocks in mid-stream, to which it resorts at regular intervals 

 during the day, possibly for the purpose of feeding on small 

 moUusks. The chestnut on the wings is very conspicuous in 

 flight, 



56. DlLOPHUS CARUNCULATUS (Gm.). 



During our stay at Chicowa a flock of young males visited 

 pools of water in an extensive reed-bed near the river on 

 September 4. 



Immature ^ . Bill brownish horn ; iris brown ; soft parts 

 greenish yellow ; legs and feet brown. 



57. CORVULTUR ALBICOLLIS (Latll.). 



By no means common, being observed in pairs. Unlike 

 Corvus scapulatus, it is a resident about the Zambesi, while in 

 whatever locality it was seen the latter species was absent. 

 During our stay at Mesanaugue in August, a pair con- 

 tinually visited a patch of rocks skirting the river, always 

 coming from and going in the direction of some rocky hills, 

 where no doubt they had a nest. At Zumbo, on Novem- 

 ber 13, we obtained an adult male out of a pair. It was in 

 a moulting condition. 



58. Corvus scapulatus Daud. 



This species was seldom observed in pairs, but in large 

 flocks, and appears to be migratory in the Zambesi region. 

 When visiting Maramao, near Shupanga, on February 9, we 

 disturbed a large number of these birds in a mealie-field. 

 At our approach they all rose up with a great uproar, and 

 circled in the air after the manner of Rooks. 



59. DiCRURUS AFER (Licht.) . 



This Drongo is ubiquitous, especially on the lower reaches 

 of the river. His presence becomes quite boring after a 

 time, while he often succeeds in depriving the collector of a 

 rare specimen by uttering his harsh notes of warning just 

 at the critical moment. Marpela-fields in the vicinity of 

 villages attract numbers of these birds, where they may be 



