Results 41 to 50 of about 2,126 (153)

Sexual dichromatism increases with altitude in birds with ultraviolet sensitive vision

open access: yesJournal of Zoology, Volume 326, Issue 1, Page 77-88, May 2025.
Previous work has shown a significant relationship between sexual dichromatism and altitude in birds, however, this work was focused on either a small subset of avian diversity or used human scoring to assess sexual dichromatism. In this study, we compared human scoring and spectrophotometry scoring to study this relationship and found no significant ...
D. A. Villar   +2 more
wiley   +1 more source

New Zealand: land or marine island? [PDF]

open access: yes, 2010
Područje Novog Zelanda iznimno je zanimljivo područje za biogeografska istraživanja jer nam daje uvid u procese širenja biljnih i životinjskih vrsta koji bi, osim lokalnog, mogli biti primjer globalnog naseljavanja tijekom geološke povijesti Zemlje ...
Bjelić, Maja
core   +2 more sources

Where is the game? Wild meat products authentication in South Africa: a case study [PDF]

open access: yes, 2013
Wild animals’ meat is extensively consumed in South Africa, being obtained either from ranching, farming or hunting. To test the authenticity of the commercial labels of meat products in the local market, we obtained DNA sequence information from 146 ...
Alechine, Evguenia   +4 more
core   +2 more sources

Parsimony and Model-Based Analyses of Indels in Avian Nuclear Genes Reveal Congruent and Incongruent Phylogenetic Signals [PDF]

open access: yes, 2013
Insertion/deletion (indel) mutations, which are represented by gaps in multiple sequence alignments, have been used to examine phylogenetic hypotheses for some time.
Bowie, Rauri CK   +4 more
core  

Multi-modal locomotion:from animal to application [PDF]

open access: yes, 2013
The majority of robotic vehicles that can be found today are bound to operations within a single media (i.e. land, air or water). This is very rarely the case when considering locomotive capabilities in natural systems.
Burgess, S. C.   +2 more
core   +1 more source

The Lithornithiformes (Aves) from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK)

open access: yesPapers in Palaeontology, Volume 11, Issue 1, January/February 2025.
Abstract We describe multiple partial skeletons and isolated bones of the palaeognathous Lithornithiformes from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK). The well‐preserved specimens are assigned to at least four species of the taxa Lithornis and Pseudocrypturus. Two species of Lithornis are identified as L. nasi and L.
Gerald Mayr, Andrew C. Kitchener
wiley   +1 more source

Kiwi forego vison in the guidance of their nocturnal activities [PDF]

open access: yes, 2007
We propose that the Kiwi visual system has undergone adaptive regression evolution driven by the trade-off between the relatively low rate of gain of visual information that is possible at low light levels, and the metabolic costs of extracting that ...
Corfield, Jeremy   +5 more
core  

A multiplex PCR for detection of poxvirus and papillomavirus in cutaneous warts from live birds and museum skins [PDF]

open access: yes, 2012
Viral cutaneous lesions are frequent in some bird populations, though we are generally ignorant of the causal agent. In some instances, they represent a threat to livestock and wildlife health.
Figuerola, Jordi
core   +2 more sources

Vertebrate diversity and biomass along a recovery gradient in a lowland tropical forest

open access: yesBiotropica, Volume 57, Issue 1, January 2025.
Deforestation of tropical forests has resulted in large areas of secondary forests with the potential for biodiversity to re‐establish to levels usually found in old‐growth forests. This study shows that diversity and biomass of mammals and birds in regenerating forests can recover to old‐growth levels within a relatively short time.
Nina Grella   +17 more
wiley   +1 more source

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