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Cited by 95 publications
(31 citation statements)
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“…One of the habitat requirements of yellowheads is to have their nests placed in emergent stands next to open water . Yellowheads forage extensively on their territories and probably rely on these openings in the emergents for the production of invertebrate food items (Orians 1980). Restored wetlands with only a small amount of emergent cover probably have few sheltered areas for the production of invertebrates.…”
Section: Discussionmentioning
confidence: 99%
“…One of the habitat requirements of yellowheads is to have their nests placed in emergent stands next to open water . Yellowheads forage extensively on their territories and probably rely on these openings in the emergents for the production of invertebrate food items (Orians 1980). Restored wetlands with only a small amount of emergent cover probably have few sheltered areas for the production of invertebrates.…”
Section: Discussionmentioning
confidence: 99%
“…2000). Reproductive success in many birds depends upon matching nesting date to the availability of food for offspring (Orians 1980). In such cases, phenological change leads to resistance rather than (lack of) resistance leading to phenological change.…”
Section: Some Larger Issues In Phenology Stress Resistance and Genetmentioning
confidence: 99%
“…Marshes located in arid regions regularly dried up and therefore probably contained low densities of fish. In one study site ORIANS (1980) observed that after introduction of carp "..the emergence of insects becomes almost totally eliminated by the fish" and Yellowheaded Blackbirds Xanthocephalus xanthocephalus which are highly specialised on aquatic insects, disappeared within a few years after the carp invasion.…”
Section: ) Winter Temperature and Fish Populationmentioning
confidence: 99%