Breeding at coastal sites is more successful than breeding at montane sites as they start breeding earlier, hatch larger broods and fledge more young. They are also subject to lower levels of nest predation.
Birds that breed at coastal locations have a higher success rate compared to those in mountainous areas. Coastal birds begin breeding earlier, raise larger clutches of chicks, and successfully raise more young. Additionally, they face fewer threats from predators nesting in their nests.