240 Mr. A. L. Butler on the 



b. S • Khor Kobslmm, 5. 3. 07. 



c. S • Gardein, 6. 4. 07. 



d. S ' Kuanga's, 23. 3. 07. 



The Standard-winged Nightjar is locally migratory in the 

 Soudan^ its movemeuts being probably dependent on the 

 supply of water, near which it is generally found. After 

 leaving Meshra-el-Rek on January 15th, I did not see a 

 single Standard-wing until March 5th (south of ChakChak). 

 On my return journey after that date I met with it almost 

 every day, and along the road to Meshra it was quite 

 numerous. It was especially plentiful round Gardeia, 

 where on April 4th, 5th, and 6th there were literally dozens 

 on the wing in the dusk of the evening around a few 

 pools of water. On these three evenings I sat by the 

 pools and watched the beautiful birds gliding and wheeling 

 round me within a few yards. I think that this '' gathering 

 of the Standards " was one of the most remarkable sights 

 of bird-life that I have ever seen. 



Though I repeatedly came on them at rest in the daytime, 

 I have never yet seen a bird sitting with the " standards ^' 

 erect. 



A female shot at Gardein on April 5tli had the ninth 

 primaries noticeably narrower than the others, and on these 

 feathers the chequer markings were blurred and indistinct. 

 Other females examined shewed no peculiarity in the feathers 

 to correspond with the " standards " of the male. 



154. SCOTORNIS CLIMACURUS (Vieill.). 



The Long-tailed Nightjar was abundant on the Bahr-el- 

 Ghazal River and from Meshra to Chak Chak. I came 

 across its eggs several times in February and March, once or 

 twice on quite open ground, where the sitting bird was 

 exposed to the full heat of the sun. 



155. EURYSTOMUS AFER (Lath.). 



a. S- ^^ov Gitti, 24.3.07. 



The only example of this species that I saw was on my 

 Bahr-el-Ghazal trip. 



