Un paio di corna knobbed, o a volte chiamato Sulawesi rugged hornbill (Rhyticeros cassidix), sta condividendo il cibo come stanno foraging su un ficus (fico) albero nella riserva naturale di Tangkoko, Sulawesi settentrionale, Indonesia. A causa della loro dipendenza dalle foreste e da alcuni tipi di alberi, le corna in generale sono minacciate dal cambiamento climatico. "Ci sono prove in rapida crescita per gli effetti negativi delle alte temperature sul comportamento, la fisiologia, l'allevamento e la sopravvivenza di varie specie di uccelli, mammiferi e rettili in tutto il mondo", ha detto il dottor Nicholas Pattinson, uno scienziato dell'Università di Città del Capo.
3922 x 2615 px | 33,2 x 22,1 cm | 13,1 x 8,7 inches | 300dpi
Data acquisizione:
27 gennaio 2012
Ubicazione:
North Sulawesi, Indonesia
Altre informazioni:
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A pair of knobbed hornbills, or sometimes called Sulawesi wrinkled hornbill (Rhyticeros cassidix), is sharing food as they are foraging on a ficus (fig) tree in Tangkoko Nature Reserve, North Sulawesi, Indonesia. Due to their dependency on forest and certain types of trees, hornbills in general are threatened by climate change._ "There is rapidly growing evidence for the negative effects of high temperatures on the behavior, physiology, breeding, and survival of various bird, mammal, and reptile species around the world, " said Dr. Nicholas Pattinson, a scientist from University of Cape Town, as quoted by Newsweek on May 5, 2022._ A research conducted by a team of scientists led by Pattinson himself (the paper is available on Phys.Org) revealed that there is a connection between warming temperature and the survival rate of a different species of hornbill, the yellow-billed hornbill (Tockus leucomelas)._ "Much of the public perception of the effects of the climate crisis is related to scenarios calculated for 2050 and beyond. Yet the effects of the climate crisis are current and can manifest not just within our lifetime, but even over a single decade, " Pattinson added._ Hornbillls are often called "farmers of the forest in terms of their habitat, food, nest site, and seed disperses, " wrote another team of researchers led by NirKumar Puri (Forest Research Institute, Uttarakhand) in their paper first published in 2022 on International Journal of Ecology; accessed via ResearchGate._ Quoting previous works by other scientists as backgrounds in their paper about two hornbill species in Bhutan, NirKumar Puri and the team added that hornbills are "known as good indicators of the health of forests. The unique breeding ecology of these birds means that they are dependent on big trees of primary forest."_ A 2016 assessment for The IUCN Red List of Threatened Species has categorized Rhyticeros cassidix (pictured) as a Vulnerable species.
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