Drupal-Biblio17<style face="normal" font="default" size="100%">Egg-size variation in Algerian populations of the Blue Tit (Parus caeruleus ultramarinus): Effects of altitude and habitat</style>Drupal-Biblio17<style face="normal" font="default" size="100%">Food resource matching by foraging tits Parus spp. during spring-summer in a Mediterranean mixed forest; evidence for an ideal free distribution</style>Drupal-Biblio17<style face="normal" font="default" size="100%">Food resource matching by foraging tits Parus spp. during spring-summer in a Mediterranean mixed forest; evidence for an ideal free distribution</style>