What's the difference between haybird and maybird?

Haybird

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Definition:

• (n.) The European spotted flycatcher.
• (n.) The European blackcap.

Example Sentences:

Maybird

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Definition:

• (n.) The whimbrel; -- called also May fowl, May curlew, and May whaap.
• (n.) The knot.
• (n.) The bobolink.

Example Sentences: