Why are migratory species harder to protect? -They don't stay in one place long enough to be counted.
-The specific habitats along and at each end of their migration routes must be protected.
-There are too many to count.
-They migrate from one country to another.

The specific habitats along and at each end of their migration routes must be protected.

Explanation:

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ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called