BRITISH WARBLERS 155 



others being migratory. The Dartford warbler 

 is only found in the gorse districts south of the 

 Thames. The list which Colonel Irby gives is 

 as follows : 



1. The whitethroat (common). 



2. The lesser whitethroat (common). 



3. The garden warbler (common). 



4. The blackcap (common). 



5. The western orphean warbler (very rare, 



two records only). 



6. The barred warbler (scarce straggler on 



migration). 



7. The Dartford or furze warbler (local in 



gorse districts only). 



8. The western rufous warbler (three oc- 



currences only). 



9. The great reed warbler (very rare straggler). 



10. The reed warbler (common). 



11. The marsh warbler (uncommon, local). 



12. The sedge warbler (common). 



13. The aquatic warbler (three occurrences 



only). 



14. The grasshopper warbler (fairly common). 



15. Savi's warbler (rare, local). 



1 6. The yellow tree warbler (very rare 



straggler). 



17. The yellow-browed warbler (rare straggler 



on migration). 



1 8. The chiffchaff warbler (common). 



19. The willow warbler (common). 



20. The wood warbler (not common). 



