Common Cuckoo female or Grey-Billed Cuckoo female? (1 Viewer)

Hi dear Birding friends please identify this Cuckoo,this picture has taken By Mr Graham White from Scotland, two weeks back, in his visit to Yala National Park Srilanka.

Thanking you
Lal De Silva
Natuaralist

Lal,
For me the primary extension along the rectrices is wrong for anything from genus Cuculus. Therefore, a genus Cacomantis. I have already seen a couple of strangely colored Cacomantis from Sri Lanka (females with brown heads in particular). Certainly, it is a hepatic morph adult female, however, this is really, really hepatic! You can't even make out the undertail striping very well - usually you can make out two colors derived from the barring, but here you have blobby dark brown markings on a very rufous, and uniform field.

Precisely when was this shot?

Hi, thank you very much for your reply, this was taken in the 9th March at Yala National park in the morning hours,
Best Regards

Lal De Silva
Naturalist
http://wildernesslanka.blogspot.com/