whistling thorn acacia tree

acacia africa african beautiful bulbous colorful conservation corms defend defense defensive drepanolobium east ecology entry environment exit exotic flora grass grassland habitat history hole horizon kenya kenyan landscape leafy leaves mutualism mutualistic natural nature nectar outdoors peaceful plains protection protective reserve rock safari savanna scenery scenic sky solitude species sunny sunshine symbiosis symbiotic tanzania thorn thorns tourism tranquil travel tree vachellia vegetation whistle whistling wild wilderness wildlife xerophyte