Fork-tailed drongo-cuckoo (Surniculus dicruroides)

The fork-tailed drongo-cuckoo (Surniculus dicruroides) is a species of cuckoo that resembles the Black drongo (Dicrurus macrocercus).

Surniculus: possibly from French Surnicou: sournois deceitful; Coucou cuckoo. It is also likely a portmanteau of the genus name Surnia (owl) and Cuculus (cuckoo). It can also be interpreted from Latin as a combination of surnos (or sournos) for "deceitful" and cuculus for "cuckoo," referencing the bird's deceptive nature. 
culus: In Latin, "culus" is a vulgar word meaning "buttocks," "posterior," or "anus". The Latin suffix -culus is a diminutive suffix used to mean "little" or "small," similar to the function of suffixes in both Latin and English. 

The suffix "-oides" in dicruroides is from Greek and Latin, as part of the Greek word "-eides" (meaning "like" or "in the form of"), combined with "Dicrurus," a genus name derived from Greek. The genus name Dicrurus itself comes from the Greek words "dikros" (forked) and "oura" (tail).
The name dicruroides literally translates to "like a drongo" or "in the form of a drongo," referring to the fact that the Fork-tailed Drongo-Cuckoo (Surniculus dicruroides) resembles a drongo.