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Article
E. L. O'Brien, Auteur ; B. L. Morrison, Auteur ; L. S. Johnson, AuteurWe compared haematocrits and blood haemoglobin concentrations of nestling House Wrens Troglodytes aedon in nests with relatively large numbers of haematophagous larvae of the blow fly Protocalliphora parorum (> 6.4 large larvae/nestling) and nes[...]
Article
K. Lago, Auteur ; L. S. Johnson, Auteur ; D. J. Albrecht, AuteurWe compared the growth of late-hatched, competitively disadvantaged nestlings to that of their first-hatched, larger nestmates in 12 asynchronously hatching broods in a Wyoming population of House Wrens (Troglodytes aedon). Upon hatching, late-h[...]
Article
L. S. Johnson, Auteur ; L. E. Wimmers, Auteur ; S. Campbell, Auteur ; L. Hamilton, AuteurIn tree swallows Tachycineta bicolor, last-laid eggs typically hatch one to two days after the other eggs in the clutch hatch, putting last-hatched offspring at a disadvantage when competing for food delivered by parents. We studied the biology [...]
Article
L. S. Johnson, Auteur ; J. Wise, AuteurWe analyzed 2426 records of recoveries of banded House Wrens (Troglodytes aedon) to identify wintering sites of individuals coming from different parts of this species' broad North American breeding range. Records suggest that most birds breedin[...]
