scholarly journals Evidence of Predation on Nestling Birds by Eastern Gartersnakes (Thamnophis sirtalis sirtalis)

2016 ◽  
Vol 130 (2) ◽  
pp. 146 ◽  
Author(s):  
William D. Halliday
Keyword(s):  
Natural History ◽  
Food Choice ◽  
Prey Availability ◽  
Prey Preference ◽  
Thamnophis Sirtalis ◽  
Space And Time ◽  
History Of ◽  
The Common ◽  
Prey Items

Diet is an important aspect of the natural history of all animals, but diet can vary through space and time because of variations in prey availability. The diet of the Common Gartersnake (Thamnophis sirtalis) consists mainly of earthworms and frogs, but other prey items might be important when they are locally abundant. I report an observation of a female Eastern Gartersnake (Thamnophis sirtalis sirtalis) regurgitating 2 nestling birds in Ottawa, Ontario, Canada. Birds are seldom present in the diet of the Common Gartersnake. This rare food choice highlights the opportunistic nature of foraging by adult Common Gartersnakes and, further, demonstrates that diet depends not only on prey preference, but also on prey availability.

Natural history of the common tree snake, Dendrelaphis punctulatus (Serpentes:Colubridae), in the wet - dry tropics of north Queensland

2010 ◽  
Vol 58 (6) ◽  
pp. 384 ◽  
Author(s):  
S. Fearn ◽  
D. F. Trembath
Keyword(s):  
Body Size ◽  
Natural History ◽  
Reproductive Period ◽  
Museum Specimens ◽  
Dry Tropics ◽  
History Of ◽  
Tropical Australia ◽  
The Common ◽  
Common Tree ◽  
Prey Items

Common tree snakes, Dendrelaphis punctulatus, are medium to large colubrid snakes that are relatively common in the eastern and northern parts of tropical Australia. The only previous study on this species involved museum specimens from across the taxon’s range. During a seven-year period we collected data on 131 field-caught specimens from a melanotic population in the Townsville district of north Queensland. Dendrelaphis punctulatus was found to be primarily diurnal, with a peak in activity centred around the reproductive period during the transition from dry to wet seasons. Females were larger than males with respect to all measured parameters, including mass and head size. Reproduction in females was strongly seasonal and clutch size was related to maternal body size. Prey items consisted of frogs, lizards and locusts.

scholarly journals Notes on the Life Cycle and Natural History of Dismorphia Virgo (Lepidoptera Pieridae: Dismorphiinae) in Costa Rica

1972 ◽  
Vol 79 (3) ◽  
pp. 165-178 ◽  
Author(s):  
Allen M. Young
Keyword(s):  
Life Cycle ◽  
Costa Rica ◽  
Natural History ◽  
Taxonomic Status ◽  
Central American ◽  
South American ◽  
Species Status ◽  
New Information ◽  
History Of ◽  
The Common

This paper summarizes the life cycle and some aspects of natural history of the tropical pierid, Dismorphia virgo (Dismorphiinae) in Costa Rica. The precise taxonomic status of the butterfly in Central America has not been established, and it may represent a variable northern isolate of the common South American D. critomedia. Therefore, independent of whether the Central American form discussed in this paper has achieved full species status as the more northern virgo or is a subspecies or variety of critomedia evolving towards species status, this paper provides new information on the biology of the butterfly in Costa Rica. The establishment of precise taxonomic position awaits further study, and for the present purpose, I refer to the butterfly as D. virgo.

scholarly journals How to Teach History of Philosophy and Science: A Digital Based Case Study

2018 ◽  
pp. 84
Author(s):  
Andrea Reichenberger
Keyword(s):  
Teaching Practice ◽  
History Of Philosophy ◽  
Online Reading ◽  
Space And Time ◽  
Foundations Of Physics ◽  
History Of ◽  
Relational Concepts ◽  
The Common ◽  
Present Case Study

The following article describes a pilot study on the possible integration of digital historiography into teaching practice. It focuses on Émilie Du Châtelet’s considerations of space and time against the background of Leibniz’s program of analysis situs. Historians have characterized philosophical controversies on space and time as a dichotomy between the absolute and relational concepts of space and time. In response to this, the present case study pursues two aims: First, it shows that the common portrayal simplifies the complex pattern of change and the semantic shift from absolute-relational concepts of space and time to invariance and conservation principles. Second, against this background, I present the Online Reading Guide on Émilie Du Châtelet’s Foundations of Physics, a teaching and research project designed to help navigate Du Châtelet’s Institutions physiques (1740/42). This project makes Du Châtelet’s important text visible to a broad audience and allows for a more critical and deeper view on classical topics of the history of philosophy and science in a more accessible way than traditional introductions.

scholarly journals Natural history of the common iliac artery in the presence of an abdominal aortic aneurysm

2009 ◽  
Vol 49 (4) ◽  
pp. 881-885 ◽  
Author(s):  
Toby Richards ◽  
Asela Dharmadasa ◽  
Rachael Davies ◽  
Michael Murphy ◽  
Rafael Perera ◽  
...  
Keyword(s):  
Abdominal Aortic Aneurysm ◽  
Aortic Aneurysm ◽  
Natural History ◽  
Iliac Artery ◽  
Common Iliac Artery ◽  
Abdominal Aortic ◽  
History Of ◽  
The Common

Health Observation of School Children,

PEDIATRICS ◽  
1965 ◽  
Vol 36 (2) ◽  
pp. 191-191
Author(s):  
JOHN L. GREEN
Keyword(s):  
Natural History ◽  
School Children ◽  
Medical Personnel ◽  
Organ System ◽  
The Body ◽  
School Age Children ◽  
School Age ◽  
Essential Information ◽  
History Of ◽  
The Common

This is a neatly organized, practical medical text written in easily understandable language covering the major physical and emotional problems of school-age children. The eighteen chapters review for non-medical personnel each organ system of the body including the special senses; there are sections, too, on the physical, emotional, intellectual, and social maturation of children. The appendices outlining the latest recommended immunization schedules and the essential information concerning the natural history of the common communicable diseases are complete and up to date.

THE NATURAL HISTORY OF THE COMMON COLD

The Lancet ◽  
1949 ◽  
Vol 253 (6541) ◽  
pp. 71-75 ◽  
Author(s):  
C.H. Andrewes
Keyword(s):  
Natural History ◽  
Common Cold ◽  
History Of ◽  
The Common

scholarly journals Evidence of cannibalism in a population of western Galápagos racers Pseudalsophis occidentalis (Serpentes: Colubridae)

2021 ◽  
pp. 6-11
Author(s):  
LUIS ORTIZ-CATEDRAL
Keyword(s):  
Natural History ◽  
Trophic Interactions ◽  
Galapagos Islands ◽  
Galápagos Islands ◽  
Galapagos Archipelago ◽  
Faecal Samples ◽  
History Of ◽  
Common Behaviour ◽  
Prey Items

Cannibalism is a common behaviour among snakes, but it has not yet been verified for any of the nine species of Galápagos racer (Pseudalsophis spp.), a group endemic to the Galápagos archipelago, Ecuador. Galápagos racers are opportunistic generalists feeding on a variety of vertebrate prey. There are a few anecdotal and suspected attempts of cannibalism among Galápagos racers, but it is unclear whether this behaviour occurs and if so, how frequent it is. We analysed 61 faecal samples from western Galápagos racers (Pseudalsophis occidentalis). In addition to the remains of well known prey items such as lizards, we found snake teeth and skin fragments in 11 samples. Combined with previous observations of attempted cannibalism between western Galápagos racers, our results represent evidence that this species consumes other racers as prey. Our study contributes to a growing knowledge of the natural history of Galápagos racers and highlights the role of these reptiles in complex trophic interactions in the Galápagos islands.

scholarly journals Experiments to ascertain if certain Tabanidæ act as the carriers of Trypanosoma pecorum

1911 ◽  
Vol 83 (565) ◽  
pp. 349-358 ◽  
Keyword(s):  
Natural History ◽  
Royal Society ◽  
Domestic Animals ◽  
Cultural Characteristics ◽  
History Of ◽  
The Common

The study of the trypanosome diseases of domestic animals in Uganda was a branch, and an important one, of the work undertaken by the Commission. Among other points arising in this investigation, the finding, if possible, of a carrier of the various trypanosome diseases was necessary. In the 'Proceedings' of the Royal Society, the Commission published a paper entitle "Trypanosome Diseases of Domestic Animals in Uganda. I.— Trypanosoma Pecorum ." This paper gives full details as to the definition, morphological and cultural characteristics, and distribution in Africa, of Trypanosoma pecorum . A few experiments and experiences of the Commission were also given, which led to the belief that possibly Tabanidæ were the common carriers in Africa of the disease caused in cattle by this trypanosome. With the object of gaining further knowledge on this important problem, the Commission worked in Uganda from January to July, 1910, on the following lines:— 1. An investigation of the biting flies occurring in the vicinity of the laboratory at Mpumu, Chagwe, Uganda. 2. A study of the natural history of these biting flies. 3. Transmission experiments with these flies. 4. A study of the flagellates, if any, natural to these flies.

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