2 sentences for 合群 (hé​qún)

1. 他性格孤僻，不太合群。

   tā xìng​gé gū​pì, bù tài hé​qún.

   He is solitary and doesn't fit in very well with others.

   Source: Dong Chinese Dictionary

2. 这种鸟喜欢合群，经常成百上千地飞往南方。

   zhè zhǒng niǎo xǐ​huan hé​qún, jīng​cháng chéng​bǎi​shàng​qiān de fēi​wǎng nán​fāng.

   These birds are gregarious and often fly south in the hundreds or thousands.

   Source: Dong Chinese Dictionary