Brown-headed Cowbird (Molothrus ater) Science Article 21 abstract Swallows are parasitized rarely by Brown-headed Cowbirds (Molothrus ater). I added cowbird eggs to 15 Tree Swallow (Tachycineta bicolor) nests. One egg disappeared and seven failed to hatch whereas 63 of 66 host eggs hatched. The seven cowbird hatchlings died in 3-12 (mean = 6.3) d, whereas […]
Tag: Brown-headed Cowbird
Brown-headed Cowbird (Molothrus ater)
[order] PASSERIFORMES | [family] Icteridae | [latin] Molothrus ater | [UK] Brown-headed Cowbird | [FR] Vacher a tete brune | [DE] Braunkopf-Kuhstarling | [ES] | [NL] Bruinkopkoevogel Subspecies Genus Species subspecies Breeding Range Breeding Range 2 Non Breeding Range Dives ater Molothrus ater NA, MA s Canada to s Mexico Molothrus ater artemisiae Molothrus ater […]