Common Hawk-Cuckoo
Hierococcyx varius
The common hawk-cuckoo is a medium- to large-sized cuckoo, about the size of a pigeon (ca. 34 cm). The plumage is ashy grey above; whitish below, cross-barred with brown. The tail is broadly barred. The sexes are alike. They have a distinctive yellow eye ring. Subadults have the breast streaked, similar to the immature shikra, and there are large brown chevron marks on the belly. At first glance they can be mistaken for a hawk.
ID text from Wikipedia, CC BY-SA 4.0

Guira Cuckoo
Guira guira
The guira cuckoo has a total length of approximately 34 cm (13 in) and weighs 140 g (4.9 oz). The sexes are very similar in appearance, except that the female is slightly larger than the male. Juveniles appear quite similar to adults. The species has dark brown upperparts streaked with white, and whitish-buff throat, breast, underparts and rump. The tail is relatively long and broad, dark brown in color with a white-tip, and the legs are dark gray. The eyes and beak are yellow to orange, with a thin ring of featherless yellow skin around the eye (this commonly fades in captivity).
ID text from Wikipedia, CC BY-SA 4.0
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Common Hawk-Cuckoo and Guira Cuckoo.