Sigiria Forest 28: Tiny Tweeter
The cache is hidden in a large hole in a large tree with a split trunk about 8m off the trail to the east. You should see a group of these common ground-feeding birds as you pass along the forest trails.
See GC4PD3V Karura Forest #1: Intro, info & entry for background info on the forest, opening times, entry fees, etc. and here for a detailed map of Karura & Sigiria Forests and/or download a Google Earth file of the trails here.
To reach the cache: to reach the cache location: park at the Thigiri Gate F entrance parking area @ S 01° 14.431 E 36°47.710. After parking and paying your entry fee, exit the car park at the north-eastern corner to join the main trail. Follow the trail for some 600m past Junctions 50a, and J60 to J51. Turn left (north) here and proceed for around 150m through J64 to the cache location.
Permission to place the cache was kindly granted by the Director of the Kenya Forest Service.
The red-billed or Senegal firefinch (Lagonosticta senegala) is a small (10cm) passerine bird. This estrildid finch (see here for info on this 
large family of birds) is a resident breeding bird in most of Sub-Saharan Africa with an estimated global extent of occurrence of 10M km2. There are two sub-species, the one found in Kenya is L.s.ruberrima. It is found <2,250m throughout most of the country (often near water) except forest interiors and deserts and it is scarce on the coast away from habitation.
The male is entirely wine-red apart from brown wings, with a pink bill and yellow eye-ring. Females are uniformly brown above and buff below, with a small red patch in front of the eyes. Both have small white spots on the sides of the face and rump which are lacking in juveniles.
This widespread and abundant species is common around human habitation - the familiar fire-finch of towns and village - often with other species like the red-cheeked cordon-bleu, and its soft queet-queet call is a familiar African sound. The song is a rising chick-pea-pea-pea. Listen here, here, and here.
It is a gregarious bird which feeds mainly on grain and other seeds. It frequents open grassland and cultivation. The nest is a large domed grass structure with a side entrance, built low in a bush, wall or thatch into which 3-6 white eggs are laid. Its nest is parasitised by the village indigobird.
Estrildid finches, including the RBF are popular cage and aviary birds.
Videos: see here for a male foraging amongst grass for seeds, here for a male perched, here for a male feeding and drinking, and here for a pair preening.