Both clusters were found on a tree in the Botanic Gardens, identified to be a Terminalia ivorensis.

These were from early December, seen for about two days and thereafter they disappeared (from sight):

These are more recent - they have been stationary near the base of the tree since last week. Each cat is 8-9cm long, and I counted about ~160 individuals:

Would appreciate some pointers as to what they may be. Thanks!