bwk

Photo credit
Crimson-backed Sunbird - George Mothi Justin
Purple Sunbird - Dhritiman Hore
Purple-rumped Sunbird & Loten’s Sunbird - Bijoy KI
Little Spiderhunter - Biju Pb

Scientific & Malayalam names
Crimson-backed Sunbird = Small Sunbird = Leptocoma minima = ചെറുതേൻകിളി
Purple Sunbird = Cinnyris asiaticus = കറുപ്പൻ തേൻകിളി
Purple-rumped Sunbird = Leptocoma zeylonica = മഞ്ഞത്തേൻകിളി
Loten’s Sunbird = Cinnyris lotenius = കൊക്കൻ തേൻകിളി
Little Spiderhunter = Arachnothera longirostra = തേൻകിളിമാടൻ

Habitat & Status (Kerala)
Added in the plate itself.

Calls
Crimson-backed Sunbird - http://www.xeno-canto.org/browse.php?query=Leptocoma+minima
Purple Sunbird - http://www.xeno-canto.org/browse.php?query=Cinnyris+asiaticus
Purple-rumped Sunbird - http://www.xeno-canto.org/browse.php?query=Leptocoma+zeylonica
Loten’s Sunbird - http://www.xeno-canto.org/browse.php?query=Cinnyris+lotenius
Little Spiderhunter - http://www.xeno-canto.org/browse.php?query=Arachnothera+longirostra