| 11. | The former is probably a sexual attractant but the latter may be defensive.
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| 12. | As with nepetalactone, found in catnip, dihydroactinidiolide is a cat attractant.
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| 13. | It can act as either an attractant or a repellent for various insects.
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| 14. | It also serves as an attractant to immune cells.
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| 15. | It is a sexual attractant to male cockroaches, especially at short ranges.
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| 16. | The best all-around attractant bird food is black-oil sunflower seed.
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| 17. | It makes it a long-range attractant.
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| 18. | Thornhill and other researchers believe symmetry may be the most important attractant of all.
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| 19. | It was said to be a sexual attractant.
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| 20. | An attractant is pumped in to see if mosquitoes will come to the screen.
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