Results 111 to 120 of about 1,377 (205)

Avian adrenal medulla : cytomorphology and function [PDF]

open access: yes, 2001
The purpose of this review is to explore the world literature on the avian adrenal medulla from the last 20 years. Unlike the mammalian adrenal medulla, the adrenal gland in birds has chromaffin cells mixed with cortical cells.
Carmichael, Stephen W.   +2 more
core   +3 more sources

The population and range expansion of the Egyptian Goose (Alopachen aegyptiacus) across the UK 1993-2014 [PDF]

open access: yes, 2016
Non-native waterbird populations are increasing through much of Europe with some species showing conspicuously successful invasions. Much uncertainty surrounds the potential impacts of invasive waterbirds on native waterbird communities and wetlands ...
O'Connor, James Michael
core  

Naturalized Parrot (Psittaciformes) Distribution & Local Processes: An Investigation of Environmental Niches and Population Genetics [PDF]

open access: yes
The introduction of invasive species, along with climate change and habitat loss, are among the primary concerns for the conservation of biodiversity at a global scale.
Calzada Preston, Carlos E.
core   +1 more source

Correlates of elevational specialisation in Southeast Asian tropical birds

open access: yes, 2012
The understanding of elevational selectivity in extremely rich tropical biotas is critical to the study of accelerating human-mediated environmental changes (e.g., deforestation and global climate warming).
Peh, Kelvin S.-H.   +3 more
core  

Cambios en la abundancia de aves en un fragmento de bosque neotropical durante un período de 25 años: una revisión [PDF]

open access: yes
Few data are available to evaluate the long term effects of habitat isolation on species richness or abundances in the tropics. Barro Colorado Island (BCI), Panama, has been studied for more than 80 years since its isolation from surrounding lowland ...
Robinson, W. D.
core  

A Preliminary Study on Avian Fauna at Govt. (Model, Autonomous) Holkar Science College, Indore, (M.P.) [PDF]

open access: yes, 2018
In the present study carried out at the Govt. (Model, Autonomous) Holkar Science Campus, total 51 species of birds belonging to 14 Orders and 33 Families were recorded.
Bhonsle, Osho   +3 more
core   +1 more source

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