Pollination disrupted by Rose-ringed Parakeets.
I recently observed and video recorded the feeding behavior of Rose-ringed parakeet at Changi Business Park canal. Rose-ringed Parakeets also known as Ring-necked Parakeet is an uncommon introduced resident . Their diet generally includes fruits, berries, vegetables, buds, nuts, and seeds. A female Rose-ringed Parakeet flew and perched on to a Tabebua rosea with white Trumpet flowers. It nicely plucked one flower , sucked its nectar from the bottom and dropped the flower . It continued this process of plucking & sucking nectar from seven such flowers . I was curious to understand more about this behavior and researched online.
Parakeets feed on nectar only if other food listed above is in short supply . Some plants in Amazon & Tasmania do attract certain parakeets & parrots ( Golden winged Parakeets in Amazon & Swift Parrots in Australia) to feed on its nectar and rely on them for pollination. These birds have both physical and behavioural adaptation for nectar feeding and tend not to destroy the flowers. They provide pollination services through their pollen-laden beaks.
However, in case of Rose-ringed parakeets , I noticed they do not have adaption for nectar feeding and hence simply pluck and suck the nectar from the flowers and while doing so disrupting food & the process of other pollinators.
Reference Parrots: The animal answer guide by Matt Cameron.
Thanks to Angie Ng for the tree identification,