Bateleur
Terathopius ecaudatus
The bateleur is of note for its unique morphology and plumage, with some anatomical similarities to both snake eagles and vultures. The species has a thick neck and a very large, rather conspicuously cowled head with a proportionately short bill, albeit one covered with a very large cere. The cowl is also present on snake eagles but in those it is less dramatically apparent. The other features in perched adult bateleurs are rather oddly stumpy, such as the short legs and exceptionally short tail, possibly the shortest proportionately of all raptors. Voice: Bateleurs are usually silent for much of the year. The main call, uttered whether perched or in aerial display, or when pirating from other raptors, is a far-carrying, loud raucous schaaaa-aw. They may too vocalize in a similar manner during courtship. Alternatively, bateleur calls may consist of resonant barking calls, kow-aw.
ID text from Wikipedia, CC BY-SA 4.0
Long-legged Buzzard
Buteo rufinus
Paler individuals of the long-legged buzzard are typically reasonably distinctive but their highly variable plumage leads to mistaken identity. The main confusion is with the even more variable common buzzard (Buteo buteo), principally of the steppe subspecies, which breeds and migrates in often similar areas. Steppe buzzards are told apart by various features of plumage, i.e. Voice: The long-legged buzzard's voice is not well studied nor is it believed to be particularly vocal. The species is known to sometimes calls on display but it is less vocal than common buzzard. The call is similar to the latter species but the notes are shorter and slightly higher. The long-legged buzzard's commonest call is a short mew.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Bateleur and Long-legged Buzzard.