Figure 5.
(a–e) The photos of nests (left column) and the nest materials (right column). The species and sampled place are shown on the left bars. In addition to grasses, bird feathers were found inside the nests (pink circles) in both blue-capped and red-cheeked cordon-bleus (b–e). Fine grasses and feathers were also found in a weaver nest (b, see also Movie S1). Flowers and stems of Mollugo nudicaulis (blue circles) were found on the outside of the nests only in blue-capped cordon-bleu own built nests (a, c; see also Fig. 2a).