Greetings dear friends of @Project.HOPE, please use this opportunity to address information on the biological behavior of animals, mainly content related to the scientific work on the consistent and intentional behavior shown by certain birds as a feeding strategy.
According to research developed by a group of expert biologists in Ornithology (branch of zoology that is dedicated to the study of birds), particularly parrots are not as absent-minded as believed, this for their inexplicable habit of wasting much of the food they catch, within these scientific deductions, it is inferred that, this act apparently meaningless, is actually intentional, and possibly seeks to improve the quality and quantity of fruits and seeds of the trees.
Fig. 2 Parrots probably waste food to improve the quality and quantity of fruits and seeds on the trees. Image of public domain, Author: Congerdesign, 2015
In this sense, the PnD. González Esther, professor of biology at the University Miguel Hernández of Elche - Spain, and principal investigator of the studies developed on the food waste behavior of parrots as a feeding strategy in their natural environment, indicates that to date 6,253 observations have been made in 103 subspecies of parrots located in 37,612 geographic kilometers in specific eco-regions of Europe, Asia, America and Africa.
Fig. 3 Studies on parrot behaviour have so far been developed in specific eco-regions of Europe, Asia, America and Africa. Image of public domain, Author: TeeFarm, 2017
Direct observations made in the field reveal that parrots are not as clueless as believed until now, mainly because there is a part of the fruits and seeds that, clearly, they throw with intention, otherwise they could not change their behavior in the breeding season, nor discern if a more or less green fruit falls.
In summary, dear readers of @Project.HOPE, this apparently senseless act for us humans, is actually intentional habit, and it follows that the parrots are probably looking to improve the quality and quantity of the fruits and seeds of the trees, therefore, it is a strategy of these birds to improve their diet.
BIBLIOGRAPHICAL REFERENCES CONSULTED:
 González E. Study finds that parrots throw food on the ground to improve the number and quality of future fruits and seeds. Article: Online access
 Giaimo C. Why Do Parrots Waste So Much Food?. Article: Online access