ScienceShot: Urban Bird Behavior May Divide a Species

2021 ◽  
Keyword(s):  
2018 ◽  
Vol 8 (2) ◽  
pp. 334-336
Author(s):  
A. V. Matsyura

Here we presented the preliminary results of hawk kite usage against the feral pigeons in some grain processing factory. We studied the temporal and spatial patterns of repellent effect and bird behavior. We suggested the feral pigeons gradually increase the level of tolerance towards the hawk kite if no additional repellent measures were undertaken. Moreover, even initially the feral pigeons demonstrate higher tolerance towards the hawk kite compared to the Rooks or Hooded Crows.


2021 ◽  
Vol 11 (7) ◽  
pp. 3084-3092
Author(s):  
Pablo Capilla‐Lasheras ◽  
Blanca Bondía ◽  
José I. Aguirre

Aerospace ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 32
Author(s):  
Isabel C. Metz ◽  
Joost Ellerbroek ◽  
Thorsten Mühlhausen ◽  
Dirk Kügler ◽  
Jacco M. Hoekstra

Bird strike prevention in civil aviation has traditionally focused on the airport perimeter. Since the risk of especially damaging bird strikes outside the airport boundaries is rising, this paper investigates the safety potential of operational bird strike prevention involving pilots and controllers. In such a concept, controllers would be equipped with a bird strike advisory system, allowing them to delay departures which are most vulnerable to the consequences of bird strikes in case of high bird strike risk. An initial study has shown the strong potential of the concept to prevent bird strikes in case of perfect bird movement prediction. This paper takes the research to the next level by taking into account the limited predictability of bird tracks. As such, the collision avoidance algorithm is extended to a bird strike risk algorithm. The risk of bird strikes is calculated for birds expected to cross the extended runway center line and to cause aircraft damage upon impact. By specifically targeting these birds and excluding birds lingering on the runway which are taken care of by the local wildlife control, capacity reductions should be limited, and the implementation remain feasible. The extrapolation of bird tracks is performed by simple linear regression based on the bird positions known at the intended take-off times. To calculate the probability of collision, uncertainties resulting from variability in bird velocity and track are included. The study demonstrates the necessity to limit alerts to potentially damaging strikes with birds crossing the extended runway center line to keep the imposed delays tolerable for airports operating at their capacity limits. It is shown that predicting bird movements based on simple linear regression without considering individual bird behavior is insufficient to achieve a safety-effect. Hence, in-depth studies of multi-year bird data to develop bird behavior models and reliable predictions are recommended for future research. This is expected to facilitate the implementation of a bird strike advisory system satisfying both safety and capacity aspects.


PLoS ONE ◽  
2016 ◽  
Vol 11 (7) ◽  
pp. e0158717 ◽  
Author(s):  
Daniel T. C. Cox ◽  
Kevin J. Gaston
Keyword(s):  

2015 ◽  
Vol 19 (4) ◽  
pp. 1535-1550 ◽  
Author(s):  
Robbert PH Snep ◽  
Jip Louwe Kooijmans ◽  
Robert GM Kwak ◽  
Ruud PB Foppen ◽  
Holly Parsons ◽  
...  
Keyword(s):  

PLoS ONE ◽  
2015 ◽  
Vol 10 (2) ◽  
pp. e0118146 ◽  
Author(s):  
Erica A. Newman ◽  
Lars Eisen ◽  
Rebecca J. Eisen ◽  
Natalia Fedorova ◽  
Jeomhee M. Hasty ◽  
...  

2019 ◽  
Vol 5 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Jukka Suhonen ◽  
Jukka Jokimäki

Abstract Temporal dynamics of local assemblages depend on the species richness and the total abundance of individuals as well as local departure and arrival rates of species. We used urban bird survey data collected from the same 31 study plots and methods during three winters (1991–1992; 1999–2000 and 2009–2010) to analyze the temporal relationship between bird species richness and total number of individuals (abundance). We also evaluated local departures and arrivals of species in each assemblage. In total, 13,812 individuals of 35 species were detected. The temporal variation in bird species richness followed the variation in the total number of individuals. The numbers of local departure and arrival events were similar. Also, the mean number of individuals of the recently arrived species (8.6) was almost the same as the mean number of individuals of the departed species (8.2). Risk of species departure was inversely related to number of individuals. Local species richness increased by one species when the total abundance of individuals increased by around 125 individuals and vice versa. Our results highlight the important role of local population departures and arrivals in determining the local species richness-abundance dynamics in human-dominated landscapes. Local species richness patterns depend on the total number of individuals as well as both the departure-arrival dynamics of individual species as well as the dynamics of all the species together. Our results support the more individuals hypothesis, which suggests that individual-rich assemblages have more species.


2019 ◽  
Author(s):  
Rébecca Kleinberger ◽  
Janet Baker ◽  
Gabriel Miller

Vocal interactions between humans and non-human animals are pervasive, but studies are often limited to communication within species. Here, we conducted a pilot exploration of vocal interactions between visitors to the San Diego Zoo Safari Park and Sampson, an 18-year-old male Hyacinth Macaw residing near the entrance. Over the course of one hour, 82 vocal and behavioral events were recorded, and various relationships between human and bird behavior were noted. Analyses of this type, applied to large datasets with assistance from artificial intelligence, could be used to better understand the impacts, positive or negative, of human visitors on animals in managed care.


Author(s):  
Christopher A. Lepczyk ◽  
Frank A. La Sorte ◽  
Myla F. J. Aronson ◽  
Mark A. Goddard ◽  
Ian MacGregor-Fors ◽  
...  

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