Jump to content
Ornithology Exchange

Hanieche Manal

General Members
  • Content Count

  • Joined

  • Last visited

Community Reputation


Profile Information

  • Location
  • Country

Recent Profile Visitors

88 profile views
  1. Hanieche Manal

    species identification

    Hi, I need more help from you to get to know to this bird that I took a picture of during the migratory birds in Algeria this year. According to the details of his beak, I think is similler to Ring-billed Gull What do you think?
  2. Birds, like all living beings, are subject to the action of the climate, which is expressed by weather conditions and their intra and interannual variations; their morphology, their physiology, their behavior, the phenology of their main activities (reproduction,migration, search for areas wintering ...), the selection of their seasonal habitats are all answers to these climate characteristics. These morphological and physiological characters, like their "traits of life history "are the result of the pressure of selection exercised environmental conditions, of which climate is one of the main components A climate change therefore amounts to a change in the selection pressure, and it is therefore legitimate to wonder, if one is interested in the conservation of the birds, on the consequences of this modification.A climate change therefore amounts to a change in the selection pressure, and it is therefore legitimate to wonder, if one is interested in the conservation of the birds, on the consequences of this modification. Is there an impact of climate change on phenology in birds? there is already evidence in birds of phenological changes in migration and nesting dates, but the consequences of which are poorly understood. Depending on the species, we can observe appropriate responses or not, including no response and phenological disjunction (the animal is no longer synchronous with its environment).there are extrinsic and intrinsic factors that could inhibit adaptations to climate change.Both researchers Sparks and Mason confirm that he there is a lot of data on the dates changes arrival of migratory birds at spring, but little on the dates of departure in winter; he analyses the first arrivals and the last departures of the winter visitors of certain species, with results often contradictory, not allowing to conclude. About reproduction, climate change underway lead to an advance of spring cycle phenology reproduction; There is no reason, at first sight, to think that the components of the food chain will vary at the same rate. This differential slip could therefore lead several species to lay at the wrong time (phenomenon of asynchrony). The consequences for species will be all the more serious as the evolutionary selection, which will lead to changing the start date of the reproduction in a more timely manner, will be carried out with a extended latency. What effects can we expect on birds whose phenology is under the influence of photoperiod? In birds, the photoperiod is the most important factor in synchronizing reproduction, moulting, migration, with recurring seasonal fluctuations environmental conditions. Man-made environmental changes can affect birds responding to photoperiod in two ways: 1- the photoperiod can become a bad predictor of favorable conditions, if the synchronous relationship between resources dependent on the temperature and length of the day change; 2- certain species may be forced to change their distribution, to remain at latitudes where the climate is favorable to them, with, as a first consequence, difficulties for these species to find new favorable habitats; in addition, they will expose themselves to new conditions of photoperiod. In both cases, it is expected that the birds will respond in an adaptive way, and that the response photoperiodic itself be the target of the selection. Thus, some species will be able to adapt to these changes but to the only provided that the genetic selection of birds adapted to the new conditions occurs quickly enough.
  3. Thought to be extinct on the Hawaiian Island for centuries, Newell's Shearwaters and Hawaiian Petrels were found using acoustic monitoring However, over the last 30 years, a few dozen dazed or dead petrels and shearwaters had been found in Oahu’s urban areas, including Honolulu. One person even made phone recordings of what sounded like the whine of a Newell’s Shearwater in 2006. Those birds could have been lost, off course, or just passing through. Or not. So when Lindsay Young, executive director of the nonprofit Pacific Rim Conservation, started a statewide survey for the two species a few years ago, she decided it wouldn’t hurt to check her home island, just in case. “We were not really expecting to find anything,” she says, “but no one had ever really looked.” Young and her team set up acoustic monitoring devices in areas of the island where they thought they would be most likely to find the seabirds. To their surprise, the recordings picked up multiple Newell’s Shearwater and Hawaiian Petrel calls in two remote mountain ranges. The findings were published in January in The Condor: Ornithological Applications.
  4. Hanieche Manal

    The Algerian birders

    The iNaturalist platform turns nature lovers into citizen scientists, collecting pictures around the world that now often can be identified with AI and used for scientific research.User numbers have doubled every year all over the world. Users now post half a million photos or audio recordings a month. And the platform has moved beyond its start as a social media network connecting scientists and nature-lovers, to be at the forefront of applying computer vision to the process of identifying and categorizing users’ posts for scientific use and curiosity’s sake. The engagement with amateurs is sorely needed to collect enough raw data to draw meaningful conclusions about the environment. I am very happy to see our project on the birds of Algeria newly created in 2018 by a group of amateurs bird watchers from different cities ,doctors, professors,foresters and others who have spent their lives monitoring and tracking birds in the country, those who love in their veins the flying wings to the point of obsession the Algerian birders https://algerianbirdersblog.wordpress.com/2018/09/04/rapport-de-la-journee-de-travail-du-18-aout-2018-a-constantine/
  5. Hanieche Manal

    Happy Darwin Day