"The rosy-faced lovebird is a fairly small bird, 17–18 cm long with an average wing length of 106 mm and tail length of 44–52 mm. Populations have been reduced in some areas by trapping for the pet trade. However numbers may have increased in other parts due to human creation of new water sources and the building of artificial structures which provide new nesting sites." - https://en.wikipedia.org/wiki/Peach-faced_lovebird
"Recently, cases of Lilian's lovebird poisoning have intensified although it is not known why poachers are poisoning the birds. Lilian's lovebird researchers assume poachers mean to poison larger mammals and lovebirds fall victims." - https://en.wikipedia.org/wiki/Lilian%27s_lovebird#Threats
They are required for most NCI samples and were never properly replaced.