Intraseasonal and especially supra-annual population peaks may amplify small mammal attack rates to significant levels, with consequences for
passerine population ecology.
Finally, in a study of European
passerines, Moller (1986) found that polygynous species were not more often sexually dimorphic in plumage than monogamous species.
The general and body condition of psittacine and
passerine birds were compared by the Mann-Whitney U test for 2 X k ordered tables.
The present study is of importance for future epidemiological and ecological investigations and because of the implications of parasitism by this species among members of this family or even in other
passerines.
Time-specific variation in
passerine nest survival: new insights into old questions.
Phenological studies in Croatia were up to now restricted to the spring arrival of breeding
passerines (Dolenec, 2003; Kralj and Dolenec, 2008; Dolenec et al., 2009).
Resident
passerines, in general, have difficulty in flying long distances, so the use of resources that are available throughout the year (e.g.
Temperature swings can be extreme and being subject to all the prevailing winds, the conditions can be particularly hostile for small
passerines [perching birds, including all songbirds].
Alden Miller stated that 315
passerine bones had been recovered, but that only 169 were identifiable, of which he identified 94 (1932).
The gray catbird (Dumetella carolinensis), a migratory
passerine bird, is known to be infected with the blood parasite Plasmodium relictum.
Fortunately, a researcher at SUNY Albany who was using very light transmitters on small
passerine birds put DEC in contact with a telemetry manufacturer who modified the tiny transmitters for an aquatic environment.
Of four species of
passerine birds analyzed in detail by Brown et al.
