1 The sun's rays are strongest during the hours of 10 a.m. to 4 p.m. The sun's rays are also stronger at higher altitudes and lower latitudes (closer to the tropics). Reflection off water, sand, or snow can make the sun's burning rays stronger.  Sun lamps can cause severe sunburn.
Marchantia polymorpha, sometimes known as the common liverwort or umbrella liverwort, is a large liverwort with a wide distribution around the world. It is variable in appearance and has several subspecies.
Migrant hawker. Aeshna mixta. The migrant hawker is a small hawker dragonfly that spends long periods patrolling a sheltered hunting territory in the air, often in small parties. If you are lucky, you may see one perched on a bush or fence when you can admire its subtle colours and markings.eshna mixta. The migrant hawker is a small hawker dragonfly that spends long periods patrolling a sheltered hunting territory in the air, often in small parties.