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For Cliff Swallows, there are many disadvantages to nesting late, but ectoparasitism may be the most important: http://t.co/nhsqTQ8tnN
For Cliff Swallows, there are many disadvantages to nesting late, but ectoparasitism may be the most important: http://t.co/nhsqTQ8tnN
Costs and benefits of late nesting in Cliff Swallows http://t.co/NXt3pSJLWU