| active hiding of social information from information-parasites. | coevolution between pairs of different kind of entities, such as providers and users of information, involves reciprocal selection pressures between them as a consequence of their ecological interaction. pied flycatchers (ficedula hypoleuca) have been shown to derive fitness benefits (larger clutches) when nesting in proximity to great tits (parus major), presumably because they this way discover and obtain information about nesting sites. tits suffer from the resulting association (smaller clut ... | 2014 | 24580842 |
| different seasonal patterns in song system volume in willow tits and great tits. | in most species of seasonally breeding songbirds studied to date, the brain areas that control singing (i.e. the song control system, scs) are larger during the breeding season than at other times of the year. in the family of titmice and chickadees (paridae), one species, the blue tit (cyanistes caeruleus), shows the typical pattern of seasonal changes, while another species, the black-capped chickadee (poecile atricapillus), shows, at best, very reduced seasonal changes in the scs. to test whe ... | 2016 | 27442125 |