Fill in the Blanks (Reading & Writing)

Every autumn, millions of songbirds abandon their breeding grounds and undertake a —perilousstationaryreluctantdomestic journey southward, guided partly by an innate sense of the Earth's magnetic field. Many species travel at night to —avoidattractresemblepostpone predation and rely on stopover sites to —replenishdiscardexchangedilute fat reserves before crossing deserts or open sea. Habitat loss along these narrow corridors now —threatenscreditsexcuseswelcomes several long-distance migrants with steep population decline.