In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Most _______(1)___________ of all to the rambler on avian lore intent is the fact that there are many species and genera that are peculiar to the West, and ______(2)________ new to him, keeping him constantly on the 'qui vive'. _____(3)________ Colorado you will look in vain for the common blue jay, so abundant in all parts of the East; but you will be more _______(4)________ compensated by the presence of seven other species _____(5)________ the jay household.