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QuestionBiology

Female cowbirds lay their eggs in other birds’ nests. They usually damage or remove one of the host bird’s eggs first, replacing it with their own egg. The cowbird egg has a short incubation period and usually hatches before the other eggs, demanding more food from the parent birds and decreasing the survival success of the other chicks. Which type of symbiotic relationship exists between cowbirds and other bird species?
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Answer

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Step 1:
Let's solve this step by step:

Step 2:
: Understand the Scenario

The description provides key details about cowbird reproductive behavior: - Cowbirds lay eggs in other birds' nests - They often damage or remove a host bird's egg - Cowbird eggs hatch quickly - Cowbird chicks demand more food from host parents - This behavior reduces survival chances of host bird's chicks

Step 3:
: Analyze Symbiotic Relationship Characteristics

A symbiotic relationship involves interaction between two different species where: - One species benefits - The other species is harmed or negatively impacted

Step 4:
: Identify Relationship Type

In this scenario: - Cowbirds benefit by:

Step 5:

Avoiding parental care

Step 6:

Ensuring offspring survival - Host birds are harmed by:

Step 7:

Loss of their own eggs

Step 8:

Reduced survival of their biological offspring

Step 9:

Expending energy feeding a non-related chick

Step 10:
: Classify Symbiotic Relationship

This description precisely matches the definition of **parasitism**: - One species (cowbird) benefits - The other species (host bird) is harmed - The relationship is one-sided and detrimental to the host

Final Answer

**Parasitism**