\glossarysection[\glossarytoctitle]{\glossarytitle}\glossarypreamble
\begin{theglossary}\glossaryheader
\glsgroupheading{A}\relax \glsresetentrylist %
\glossentry{amphibian}{\glossaryentrynumbers{\relax 
		\setentrycounter[]{page}\glsnumberformat{2}}}\glsgroupskip
\glsgroupheading{B}\relax \glsresetentrylist %
\glossentry{bird}{\glossaryentrynumbers{\relax 
		\setentrycounter[]{page}\glsnumberformat{2}}}%
\end{theglossary}\glossarypostamble