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Energetic costs and implications of the intake of plant secondary metabolites on digestive and renal morphology in two austral passerines
(Springer Heidelberg, 2016-07)
Seed-eating birds have a diet of high nutritional value; however, they must cope with plant secondary metabolites (PSM). We postulated that the detoxification capacity of birds is associated with a metabolic cost, given ...
A blurring of life-history lines: immune function, molt and reproduction in a highly stable environment.
(2015)
Rufous-collared sparrows (Zonotrichia capensis peruviensis) from valleys in the Atacama Desert of Chile, live in an extremely stable environment, and exhibit overlap in molt and reproduction, with valley-specific differences ...
Comparación del peso de diferentes tipos de plumas entre cinco especies de aves del páramo de Chirripó, Costa Rica
(1993)
Plumage weight was compared in highland and wide-range bird species (N= 18 weight samples): Sooty Robín (Tutdus nigresce/lS). Rufous-collared Sparrow (Zonotrichia cape/lSís), Volcano Junco (íunco vulcani), Slaty Flowerpiercer ...
Litter and seed burying alter food availability and foraging efficiency of granivorous birds in the Monte desert.
(Wiley Blackwell Publishing, Inc, 2013-04-30)
We assessed experimentally if the main granivorous bird species that feed on the ground in the central Monte desert are able to detect and consume seeds buried in the soil or trapped within litter. Understanding seed ...
Two new feather mites of the genus Proctophyllodes Robin (Acari formes: Proctophyllodinae) from passerines in Brazil
(2021-06-01)
Proctophyllodes Robin (Proctophyllodidae: Proctophyllodinae) is a widely distributed feather mite genus, which most species show high level of specificity to their bird hosts. We describe two new species of this genus from ...
Foraging behavior of Zonotrichia capensis (Passeriformes: Emberizidae) and patch value in young live fences in the Bogotá high plateau
(2016)
The Rufous-collared Sparrow Zonotrichia capensis is a widely distributed species in neotropical America, it is tolerant to human interventions, but we know little about its foraging ecology on the Colombian Andes. Therefore, ...
Forrajeo de Zonotrichia capensis (Passeriformes: Emberizidae) y valor del parche en cercas vivas jóvenes de la Sabana de Bogotá
(Universidad Nacional de Colombia - Sede Bogotá - Faculdad de Ciencias - Departamento de Biología, 2016-05-01)
El copetón Zonotrichia capensis tiene una amplia distribución en América neotropical, es un ave tolerante a las intervenciones humanas, pero sabemos poco sobre su comportamiento de forrajeo en los Andes colombianos. Por ...
Forest fragmentation negatively affects common bird species in subtropical fragmented forests
(Csiro Publishing, 2017-08)
Forest fragmentation threatens bird species throughout the world. Previous studies suggest that the sensitivity of bird species to forest fragmentation is related to food abundance, and that this could be a key factor in ...
Effects of nutritional and anti-nutritional properties of seeds on the feeding ecology of seed-eating birds of the Monte desert, Argentina
(Cooper Ornithological Society, 2012-02)
Food quality and physiological capacities and limitations in recognizing and processing food are among the factors influencing the choices of desert birds in feeding. Seed-eating birds of the central Monte desert generally ...