May 17 2013
Canadian Eskimo’s say that in the long ago, before it had all been quite settled whether the human creatures on this earth of ours were to remain in human form or to take the form of birds and animals, or whether the birds and animals were to be changed into human creatures, a group of …
May 02 2013
The Basques tell that once upon a time a bit of straw was blown into the Blessed Virgins eye. The redbreast (in Basque Chindorra), who was sitting on a bush close at hand, beheld her tears. What did he do? He flew off at once to tell the swallow, and then, carrying in his bill …
May 02 2013
A species of marmot is native in Poland and in nearby Galicia, as well as in the lands to the east as far as central Asia. It is also very common in Eastern Siberia. There, as elsewhere, the little animal is called Bobac. Under the shoulder of the Bobac, in the flesh, may be found …
Dec 27 2011
Tree Swallow (Tachycineta bicolor) Science Article 12 abstract Poor breeding success often increases dispersal, but there is conflicting evidenceabout the putative adaptive benefi ts of dispersal behavior. Thus, observational and experimentaldata were analyzed to test whether breeding success (number of young fl edging) infl uencedbreeding and natal dispersal by Tree Swallows (Tachycineta bicolor), using information …
Dec 27 2011
Tree Swallow (Tachycineta bicolor) Science Article 15 abstract A frequently hypothesized but poorly studied cost of multiple mating in birds is thatexposure to pathogenic sexually transmitted microbes (STM’s) can lower reproductive success.Conversely, female birds may benefit from high frequencies of copulation and multiple copulationpartners if they receive cloacal inoculations of beneficial STM’s that can either …
Dec 27 2011
Tree Swallow (Tachycineta bicolor) Science Article 4 abstract We examined the average annual lay, hatch, and fledge dates of tree swallows(Tachycineta bicolor) breeding in Creamer’s Field Migratory Waterfowl Refuge inFairbanks, AK from 2000 through 2008. From 2000 to 2008, lay and hatch dateexhibited a significant negative relationship, indicating that the timing of swallowreproduction has advanced …
Dec 27 2011
Tree Swallow (Tachycineta bicolor) Science Article 11 abstract Age-related differences in plumage characteristics of birds can be the result of differential survival of more ornamented individuals, within-individual changes in plumage attributes with age, or a combination of both. In this study, we investigated age-class related differences in plumage attributes of male tree swallows Tachycineta bicolor …
Dec 27 2011
Tree Swallow (Tachycineta bicolor) Science Article 8 abstract Much previous research has focussed on the role of food supply in determining thegrowth and the survival of avian offspring. More recently, acid deposition in someecosystems has demonstrated that in addition to energy, birds also need to acquiresufficient nutrients such as calcium to be successful. Whether procurement …
Dec 27 2011
Tree Swallow (Tachycineta bicolor) Science Article 16 abstract Despite considerable interest in its occurrence or potential occurrence (e.g., Lorenz 1963), both direct and circumstantial evidence of intraspecific killing in adult passerinesis rare (see Davis 1940, Cottrille 1950, Grubbs 1977, Loflin 1982). The purpose of this note is to add to this meager data base by …
Dec 27 2011
Tree Swallow (Tachycineta bicolor) Science Article 14 abstract The environment experienced during ontogeny has a significant impact on the physiological condition of offspring. This, in turn, forecasts survival probabilities and future reproductive potential. Despite the prominent role that the concept of condition plays in evolutionary studies, the physiological and biochemical characters that define it remain …
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