LUND, Sweden, June 8 -- The Journal of Avian Biology, which says it publish empirical and theoretical research in ornithology, with an emphasis on behavioural ecology, evolution and conservation, posted research articles on the following topics in its May 2022 edition:

Articles:

* Differences in feather structure between urban and forest great tits: constraint or adaptation?

* Declining haematocrit with increasing age in a population of male zebra finches . . .

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