Individual study: Breeding ecology and clay bank usage by macaws from Madre de Dios
Brightsmith D. & Figari A. (2003) Breeding ecology and clay bank usage by macaws from Madre de Dios. Report to INRENA
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Provide artificial nesting sites for parrots
A replicated, controlled study (Brightsmith & Figari 2003) in 1999-2003 found that scarlet macaws Ara macao occupied a large number of nest boxes at the same rainforest site as in Brightsmith 2000, with 13 of 14 PVC nest boxes and one of four wooden boxes occupied. Eggs were laid in ten; eggs hatched in six and four (all PVC tubes) fledged at least one chick. Four natural nests were used and three fledged at least one chick. When data were combined with that from 1999-2001, chick survival was similar (75-6%) in natural nests and nest boxes. Hatching rates were lower in PVC nest boxes (of the same type as in Brightsmith 2000, than in natural nests (41% vs. 65%), possibly due to higher temperature fluctuations. Hatching rates in wooden boxes were very high (80%) but the authors note the small sample size may make this result unreliable.