You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "where do ruby throated hummingbirds spend the winter?" whose answer is Central America.
Each document should contain about 30 words, and these documents should contain useful information.

Query: wintering grounds of ruby-throated hummingbirds
Useful Output:

Doc 1: They are usually gone from their nesting grounds by the end of October. Some fly more than 3,000 miles, from Minnesota and Canada to Costa Rica.
Doc 2:  wintering grounds. Ruby-throated Hummingbirds leave their northern breeding grounds during the second half of August and the first week of September. The
Doc 3: Ruby-throated Hummingbirds have been surging north from their wintering grounds (northern Panama and Costa Rica, north to southern Mexico)
Doc 4: Most of these birds migrate from California down to southern Mexico for the winter, but one south-central sub-species opts to stay put for the
Doc 5: Ruby-throated hummingbirds migrate to and from their summer breeding grounds  wintering grounds begins in late July or early August.