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Across 4. how native americans attracted purple martins to their areas, with this vegetable 5. number of toes on a martin or swallow-perching on wires 6. chimney swifts never__on branches, they even drink while flying 10. family of chimney swifts 12. max number of broods every year for a barn swallow 14. PA's smallest swallow (dig in the mud along creek banks) 15. chimney swift nests are __to a vertical surface 17. number of species of each worldwide in each of their families (a number) 18. meaning they are a group of birds that eat insects 19. family of purple martins and swallows 20. number of broods of chicks a chimney swift has 22. the earliest swallow to return to the US after winter

Down 1. the shape of the nests of a barn swallow 2. sound of a northern rough-winged swallow 3. the loss of these are really why the decline of the purple martin is happening so quickly 7. a group of these birds (a breeding___) 8. the population of these birds in on the __ 9. where chimney swifts go in the winter in Brazil 11. the largest North American Swallow 13. during wet weather they fly at __altitudes where the insects are located 14. one of the most common, abundant birds in North America 15. uses mud pellets to make a nest shaped like a gourd 16. number of toes on a chimney swift-perching on vertical surfaces 21. color of a chimney swift