Help with unidentified southern African bird calls

["Daan Hendriks" daan_humanworkshop]

Hi all,

I was hoping if any knowledgeable folk might be able to help me out with
the following. I'm trying to find out the species IDs of 4 recordings made
in southern Africa.

Anyone any ideas what these might be?

https://soundcloud.com/daan-hendriks/sets/unidentified-southern-african/s-4=
1d53


Some context:

Bird 01: Only heard at night. Recorded in northern Zimbabwe, April 2015
Bird 02: Recorded in northern Zimbabwe, April 2015
Bird 03: Recorded in northern Botswana, May 2015
Bird 04: Recorded in northern Botswana, May 2015

Any help is greatly appreciated.

Thank you,
Daan