Scientists Tackle Deadly Bird Parenting

Scarlet macaws, a striking tropical bird species, face declining populations partly due to a harsh parenting behavior where parents intentionally starve their youngest chicks. This strategy, once a survival mechanism, now hinders recovery efforts. In the Peruvian Amazon, scientists like Gabriela Vigo-Trauco are implementing rescue missions, notably by recruiting wild scarlet macaw couples to become foster parents for doomed chicks.

This innovative foster-parenting technique, tested since 2017, involves rescuing chicks and placing them with new families. One success story is Parker, a chick who fledged with an adoptive mother named Tambo, becoming the only fourth chick to do so in decades. Between 2017 and 2019, 25 other chicks were rescued, with most successfully adopted, although some succumbed to predation, disease, or unfortunate accidents.

The wild fostering method is costly and requires precise timing, making replication challenging. However, a refined technique, skipping hand-rearing and switching chicks between nests soon after birth, has shown promise since 2020. This approach is more cost-effective and has already successfully led to parents raising chicks with smaller age gaps.

Conservation efforts in other regions, like Guatemala and Costa Rica, have also focused on addressing root causes such as deforestation and poaching. Despite its complexities, the Peruvian research on wild fostering is informing conservation work for other parrot species across Central and South America.